* [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support
@ 2014-04-23 12:50 Boris Ostrovsky
2014-04-23 12:50 ` [PATCH v5 RESEND 01/17] common/symbols: Export hypervisor symbols to privileged guest Boris Ostrovsky
` (18 more replies)
0 siblings, 19 replies; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-23 12:50 UTC (permalink / raw)
To: kevin.tian
Cc: keir, jun.nakajima, andrew.cooper3, eddie.dong, donald.d.dugger,
xen-devel, dietmar.hahn, JBeulich, boris.ostrovsky,
suravee.suthikulpanit
(Resending v5 per Kevin's request)
Here is the fifth version of PV(H) PMU patches.
Changes in v5:
* Dropped patch number 2 ("Stop AMD counters when called from vpmu_save_force()")
as no longer needed
* Added patch number 2 that marks context as loaded before PMU registers are
loaded. This prevents situation where a PMU interrupt may occur while context
is still viewed as not loaded. (This is really a bug fix for exsiting VPMU
code)
* Renamed xenpmu.h files to pmu.h
* More careful use of is_pv_domain(), is_hvm_domain(, is_pvh_domain and
has_hvm_container_domain(). Also explicitly disabled support for PVH until
patch 16 to make distinction between usage of the above macros more clear.
* Added support for disabling VPMU support during runtime.
* Disable VPMUs for non-privileged domains when switching to privileged
profiling mode
* Added ARM stub for xen_arch_pmu_t
* Separated vpmu_mode from vpmu_features
* Moved CS register query to make sure we use appropriate query mechanism for
various guest types.
* LVTPC is now set from value in shared area, not copied from dom0
* Various code and comments cleanup as suggested by Jan.
Changes in v4:
* Added support for PVH guests:
o changes in pvpmu_init() to accommodate both PV and PVH guests, still in patch 10
o more careful use of is_hvm_domain
o Additional patch (16)
* Moved HVM interrupt handling out of vpmu_do_interrupt() for NMI-safe handling
* Fixed dom0's VCPU selection in privileged mode
* Added a cast in register copy for 32-bit PV guests cpu_user_regs_t in vpmu_do_interrupt.
(don't want to expose compat_cpu_user_regs in a public header)
* Renamed public structures by prefixing them with "xen_"
* Added an entry for xenpf_symdata in xlat.lst
* Fixed pv_cpuid check for vpmu-specific cpuid adjustments
* Varios code style fixes
* Eliminated anonymous unions
* Added more verbiage to NMI patch description
Changes in v3:
* Moved PMU MSR banks out from architectural context data structures to allow
for future expansion without protocol changes
* PMU interrupts can be either NMIs or regular vector interrupts (the latter
is the default)
* Context is now marked as PMU_CACHED by the hypervisor code to avoid certain
race conditions with the guest
* Fixed races with PV guest in MSR access handlers
* More Intel VPMU cleanup
* Moved NMI-unsafe code from NMI handler
* Dropped changes to vcpu->is_running
* Added LVTPC apic handling (cached for PV guests)
* Separated privileged profiling mode into a standalone patch
* Separated NMI handling into a standalone patch
Changes in v2:
* Xen symbols are exported as data structure (as opoosed to a set of formatted
strings in v1). Even though one symbol per hypercall is returned performance
appears to be acceptable: reading whole file from dom0 userland takes on average
about twice as long as reading /proc/kallsyms
* More cleanup of Intel VPMU code to simplify publicly exported structures
* There is an architecture-independent and x86-specific public include files (ARM
has a stub)
* General cleanup of public include files to make them more presentable (and
to make auto doc generation better)
* Setting of vcpu->is_running is now done on ARM in schedule_tail as well (making
changes to common/schedule.c architecture-independent). Note that this is not
tested since I don't have access to ARM hardware.
* PCPU ID of interrupted processor is now passed to PV guest
The following patch series adds PMU support in Xen for PV(H)
guests. There is a companion patchset for Linux kernel. In addition,
another set of changes will be provided (later) for userland perf
code.
This version has following limitations:
* For accurate profiling of dom0/Xen dom0 VCPUs should be pinned.
* Hypervisor code is only profiled on processors that have running dom0 VCPUs
on them.
* No backtrace support.
* Will fail to load under XSM: we ran out of bits in permissions vector and
this needs to be fixed separately
A few notes that may help reviewing:
* A shared data structure (xenpmu_data_t) between each PV VPCU and hypervisor
CPU is used for passing registers' values as well as PMU state at the time of
PMU interrupt.
* PMU interrupts are taken by hypervisor either as NMIs or regular vector
interrupts for both HVM and PV(H). The interrupts are sent as NMIs to HVM guests
and as virtual interrupts to PV(H) guests
* PV guest's interrupt handler does not read/write PMU MSRs directly. Instead, it
accesses xenpmu_data_t and flushes it to HW it before returning.
* PMU mode is controlled at runtime via /sys/hypervisor/pmu/pmu/{pmu_mode,pmu_flags}
in addition to 'vpmu' boot option (which is preserved for back compatibility).
The following modes are provided:
* disable: VPMU is off
* enable: VPMU is on. Guests can profile themselves, dom0 profiles itself and Xen
* priv_enable: dom0 only profiling. dom0 collects samples for everyone. Sampling
in guests is suspended.
* /proc/xen/xensyms file exports hypervisor's symbols to dom0 (similar to
/proc/kallsyms)
* VPMU infrastructure is now used for HVM, PV and PVH and therefore has been moved
up from hvm subtree
Boris Ostrovsky (17):
common/symbols: Export hypervisor symbols to privileged guest
VPMU: Mark context LOADED before registers are loaded
x86/VPMU: Minor VPMU cleanup
intel/VPMU: Clean up Intel VPMU code
x86/VPMU: Handle APIC_LVTPC accesses
intel/VPMU: MSR_CORE_PERF_GLOBAL_CTRL should be initialized to zero
x86/VPMU: Add public xenpmu.h
x86/VPMU: Make vpmu not HVM-specific
x86/VPMU: Interface for setting PMU mode and flags
x86/VPMU: Initialize PMU for PV guests
x86/VPMU: Add support for PMU register handling on PV guests
x86/VPMU: Handle PMU interrupts for PV guests
x86/VPMU: Add privileged PMU mode
x86/VPMU: Save VPMU state for PV guests during context switch
x86/VPMU: NMI-based VPMU support
x86/VPMU: Suport for PVH guests
x86/VPMU: Move VPMU files up from hvm/ directory
xen/arch/x86/Makefile | 1 +
xen/arch/x86/domain.c | 15 +-
xen/arch/x86/hvm/Makefile | 1 -
xen/arch/x86/hvm/hvm.c | 3 +-
xen/arch/x86/hvm/svm/Makefile | 1 -
xen/arch/x86/hvm/svm/svm.c | 6 +-
xen/arch/x86/hvm/svm/vpmu.c | 494 ----------------
xen/arch/x86/hvm/vlapic.c | 5 +-
xen/arch/x86/hvm/vmx/Makefile | 1 -
xen/arch/x86/hvm/vmx/vmcs.c | 55 ++
xen/arch/x86/hvm/vmx/vmx.c | 6 +-
xen/arch/x86/hvm/vmx/vpmu_core2.c | 931 ------------------------------
xen/arch/x86/hvm/vpmu.c | 266 ---------
xen/arch/x86/oprofile/op_model_ppro.c | 8 +-
xen/arch/x86/platform_hypercall.c | 18 +
xen/arch/x86/traps.c | 35 +-
xen/arch/x86/vpmu.c | 720 +++++++++++++++++++++++
xen/arch/x86/vpmu_amd.c | 509 +++++++++++++++++
xen/arch/x86/vpmu_intel.c | 940 +++++++++++++++++++++++++++++++
xen/arch/x86/x86_64/compat/entry.S | 4 +
xen/arch/x86/x86_64/entry.S | 4 +
xen/arch/x86/x86_64/platform_hypercall.c | 2 +
xen/common/event_channel.c | 1 +
xen/common/symbols.c | 50 +-
xen/common/vsprintf.c | 2 +-
xen/include/asm-x86/domain.h | 2 +
xen/include/asm-x86/hvm/vcpu.h | 3 -
xen/include/asm-x86/hvm/vmx/vmcs.h | 4 +-
xen/include/asm-x86/hvm/vmx/vpmu_core2.h | 51 --
xen/include/asm-x86/hvm/vpmu.h | 104 ----
xen/include/asm-x86/vpmu.h | 99 ++++
xen/include/public/arch-arm.h | 3 +
xen/include/public/arch-x86/pmu.h | 63 +++
xen/include/public/platform.h | 16 +
xen/include/public/pmu.h | 99 ++++
xen/include/public/xen.h | 2 +
xen/include/xen/hypercall.h | 4 +
xen/include/xen/softirq.h | 1 +
xen/include/xen/symbols.h | 6 +-
xen/include/xlat.lst | 1 +
40 files changed, 2661 insertions(+), 1875 deletions(-)
delete mode 100644 xen/arch/x86/hvm/svm/vpmu.c
delete mode 100644 xen/arch/x86/hvm/vmx/vpmu_core2.c
delete mode 100644 xen/arch/x86/hvm/vpmu.c
create mode 100644 xen/arch/x86/vpmu.c
create mode 100644 xen/arch/x86/vpmu_amd.c
create mode 100644 xen/arch/x86/vpmu_intel.c
delete mode 100644 xen/include/asm-x86/hvm/vmx/vpmu_core2.h
delete mode 100644 xen/include/asm-x86/hvm/vpmu.h
create mode 100644 xen/include/asm-x86/vpmu.h
create mode 100644 xen/include/public/arch-x86/pmu.h
create mode 100644 xen/include/public/pmu.h
--
1.8.3.1
^ permalink raw reply [flat|nested] 44+ messages in thread
* [PATCH v5 RESEND 01/17] common/symbols: Export hypervisor symbols to privileged guest
2014-04-23 12:50 [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Boris Ostrovsky
@ 2014-04-23 12:50 ` Boris Ostrovsky
2014-04-23 12:50 ` [PATCH v5 RESEND 02/17] VPMU: Mark context LOADED before registers are loaded Boris Ostrovsky
` (17 subsequent siblings)
18 siblings, 0 replies; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-23 12:50 UTC (permalink / raw)
To: kevin.tian
Cc: keir, jun.nakajima, andrew.cooper3, eddie.dong, donald.d.dugger,
xen-devel, dietmar.hahn, JBeulich, boris.ostrovsky,
suravee.suthikulpanit
Export Xen's symbols as {<address><type><name>} triplet via new XENPF_get_symbol
hypercall
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
xen/arch/x86/platform_hypercall.c | 18 ++++++++++++
xen/arch/x86/x86_64/platform_hypercall.c | 2 ++
xen/common/symbols.c | 50 +++++++++++++++++++++++++++++++-
xen/common/vsprintf.c | 2 +-
xen/include/public/platform.h | 16 ++++++++++
xen/include/xen/symbols.h | 6 ++--
xen/include/xlat.lst | 1 +
7 files changed, 91 insertions(+), 4 deletions(-)
diff --git a/xen/arch/x86/platform_hypercall.c b/xen/arch/x86/platform_hypercall.c
index 2162811..0a93037 100644
--- a/xen/arch/x86/platform_hypercall.c
+++ b/xen/arch/x86/platform_hypercall.c
@@ -23,6 +23,7 @@
#include <xen/cpu.h>
#include <xen/pmstat.h>
#include <xen/irq.h>
+#include <xen/symbols.h>
#include <asm/current.h>
#include <public/platform.h>
#include <acpi/cpufreq/processor_perf.h>
@@ -601,6 +602,23 @@ ret_t do_platform_op(XEN_GUEST_HANDLE_PARAM(xen_platform_op_t) u_xenpf_op)
}
break;
+ case XENPF_get_symbol:
+ {
+ char name[XEN_KSYM_NAME_LEN + 1];
+ XEN_GUEST_HANDLE(char) nameh;
+
+ guest_from_compat_handle(nameh, op->u.symdata.name);
+
+ ret = xensyms_read(&op->u.symdata.symnum, &op->u.symdata.type,
+ &op->u.symdata.address, name);
+
+ if ( !ret && copy_to_guest(nameh, name, strlen(name)) )
+ ret = -EFAULT;
+ if ( !ret && __copy_field_to_guest(u_xenpf_op, op, u.symdata) )
+ ret = -EFAULT;
+ }
+ break;
+
default:
ret = -ENOSYS;
break;
diff --git a/xen/arch/x86/x86_64/platform_hypercall.c b/xen/arch/x86/x86_64/platform_hypercall.c
index b6f380e..795837f 100644
--- a/xen/arch/x86/x86_64/platform_hypercall.c
+++ b/xen/arch/x86/x86_64/platform_hypercall.c
@@ -32,6 +32,8 @@ CHECK_pf_pcpu_version;
CHECK_pf_enter_acpi_sleep;
#undef xen_pf_enter_acpi_sleep
+#define xenpf_symdata compat_pf_symdata
+
#define COMPAT
#define _XEN_GUEST_HANDLE(t) XEN_GUEST_HANDLE(t)
#define _XEN_GUEST_HANDLE_PARAM(t) XEN_GUEST_HANDLE_PARAM(t)
diff --git a/xen/common/symbols.c b/xen/common/symbols.c
index 45941e1..bc83f76 100644
--- a/xen/common/symbols.c
+++ b/xen/common/symbols.c
@@ -17,6 +17,8 @@
#include <xen/lib.h>
#include <xen/string.h>
#include <xen/spinlock.h>
+#include <public/platform.h>
+#include <xen/guest_access.h>
#ifdef SYMBOLS_ORIGIN
extern const unsigned int symbols_offsets[1];
@@ -107,7 +109,7 @@ const char *symbols_lookup(unsigned long addr,
unsigned long i, low, high, mid;
unsigned long symbol_end = 0;
- namebuf[KSYM_NAME_LEN] = 0;
+ namebuf[XEN_KSYM_NAME_LEN] = 0;
namebuf[0] = 0;
if (!is_active_kernel_text(addr))
@@ -148,3 +150,49 @@ const char *symbols_lookup(unsigned long addr,
*offset = addr - symbols_address(low);
return namebuf;
}
+
+/*
+ * Get symbol type information. This is encoded as a single char at the
+ * beginning of the symbol name.
+ */
+static char symbols_get_symbol_type(unsigned int off)
+{
+ /*
+ * Get just the first code, look it up in the token table,
+ * and return the first char from this token.
+ */
+ return symbols_token_table[symbols_token_index[symbols_names[off + 1]]];
+}
+
+/*
+ * Symbols are most likely accessed sequentially so we remember position from
+ * previous read. This can help us avoid the extra call to get_symbol_offset().
+ */
+static uint64_t next_symbol, next_offset;
+static DEFINE_SPINLOCK(symbols_mutex);
+
+int xensyms_read(uint32_t *symnum, uint32_t *type, uint64_t *address, char *name)
+{
+ if ( *symnum > symbols_num_syms )
+ return -ERANGE;
+ if ( *symnum == symbols_num_syms )
+ return 0;
+
+ spin_lock(&symbols_mutex);
+
+ if ( *symnum == 0 )
+ next_offset = next_symbol = 0;
+ if ( next_symbol != *symnum )
+ /* Non-sequential access */
+ next_offset = get_symbol_offset(*symnum);
+
+ *type = symbols_get_symbol_type(next_offset);
+ next_offset = symbols_expand_symbol(next_offset, name);
+ *address = symbols_offsets[*symnum] + SYMBOLS_ORIGIN;
+
+ next_symbol = ++*symnum;
+
+ spin_unlock(&symbols_mutex);
+
+ return 0;
+}
diff --git a/xen/common/vsprintf.c b/xen/common/vsprintf.c
index 1a6198e..c5ae187 100644
--- a/xen/common/vsprintf.c
+++ b/xen/common/vsprintf.c
@@ -275,7 +275,7 @@ static char *pointer(char *str, char *end, const char **fmt_ptr,
case 'S': /* Symbol name unconditionally with offset and size */
{
unsigned long sym_size, sym_offset;
- char namebuf[KSYM_NAME_LEN+1];
+ char namebuf[XEN_KSYM_NAME_LEN+1];
/* Advance parents fmt string, as we have consumed 's' or 'S' */
++*fmt_ptr;
diff --git a/xen/include/public/platform.h b/xen/include/public/platform.h
index 4341f54..dc09b55 100644
--- a/xen/include/public/platform.h
+++ b/xen/include/public/platform.h
@@ -527,6 +527,21 @@ struct xenpf_core_parking {
typedef struct xenpf_core_parking xenpf_core_parking_t;
DEFINE_XEN_GUEST_HANDLE(xenpf_core_parking_t);
+#define XENPF_get_symbol 61
+#define XEN_KSYM_NAME_LEN 127
+struct xenpf_symdata {
+ /* IN variables */
+ uint32_t symnum;
+
+ /* OUT variables */
+ uint32_t type;
+ uint64_t address;
+
+ XEN_GUEST_HANDLE(char) name;
+};
+typedef struct xenpf_symdata xenpf_symdata_t;
+DEFINE_XEN_GUEST_HANDLE(xenpf_symdata_t);
+
/*
* ` enum neg_errnoval
* ` HYPERVISOR_platform_op(const struct xen_platform_op*);
@@ -553,6 +568,7 @@ struct xen_platform_op {
struct xenpf_cpu_hotadd cpu_add;
struct xenpf_mem_hotadd mem_add;
struct xenpf_core_parking core_parking;
+ struct xenpf_symdata symdata;
uint8_t pad[128];
} u;
};
diff --git a/xen/include/xen/symbols.h b/xen/include/xen/symbols.h
index 87cd77d..3017449 100644
--- a/xen/include/xen/symbols.h
+++ b/xen/include/xen/symbols.h
@@ -2,8 +2,7 @@
#define _XEN_SYMBOLS_H
#include <xen/types.h>
-
-#define KSYM_NAME_LEN 127
+#include <public/platform.h>
/* Lookup an address. */
const char *symbols_lookup(unsigned long addr,
@@ -11,4 +10,7 @@ const char *symbols_lookup(unsigned long addr,
unsigned long *offset,
char *namebuf);
+int xensyms_read(uint32_t *symnum, uint32_t *type,
+ uint64_t *address, char *name);
+
#endif /*_XEN_SYMBOLS_H*/
diff --git a/xen/include/xlat.lst b/xen/include/xlat.lst
index 8caede6..6e3994d 100644
--- a/xen/include/xlat.lst
+++ b/xen/include/xlat.lst
@@ -85,6 +85,7 @@
? processor_px platform.h
! psd_package platform.h
? xenpf_enter_acpi_sleep platform.h
+! xenpf_symdata platform.h
? xenpf_pcpuinfo platform.h
? xenpf_pcpu_version platform.h
! sched_poll sched.h
--
1.8.3.1
^ permalink raw reply related [flat|nested] 44+ messages in thread
* [PATCH v5 RESEND 02/17] VPMU: Mark context LOADED before registers are loaded
2014-04-23 12:50 [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Boris Ostrovsky
2014-04-23 12:50 ` [PATCH v5 RESEND 01/17] common/symbols: Export hypervisor symbols to privileged guest Boris Ostrovsky
@ 2014-04-23 12:50 ` Boris Ostrovsky
2014-04-26 8:20 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 03/17] x86/VPMU: Minor VPMU cleanup Boris Ostrovsky
` (16 subsequent siblings)
18 siblings, 1 reply; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-23 12:50 UTC (permalink / raw)
To: kevin.tian
Cc: keir, jun.nakajima, andrew.cooper3, eddie.dong, donald.d.dugger,
xen-devel, dietmar.hahn, JBeulich, boris.ostrovsky,
suravee.suthikulpanit
Because a PMU interrupt may be generated as soon as PMU registers are loaded (or,
more precisely, as soon as HW PMU is "armed") we don't want to delay marking
context as LOADED until after registers are loaded. Otherwise during interrupt
handling VPMU_CONTEXT_LOADED may not be set and this could be confusing.
(Technically, only SVM needs this change right now since VMX will "arm" PMU later,
during VMRUN when global control register is loaded from VMCS. However, both
AMD and Intel code will require this patch when we introduce PV VPMU).
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
xen/arch/x86/hvm/svm/vpmu.c | 2 ++
xen/arch/x86/hvm/vmx/vpmu_core2.c | 2 ++
xen/arch/x86/hvm/vpmu.c | 3 +--
3 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/xen/arch/x86/hvm/svm/vpmu.c b/xen/arch/x86/hvm/svm/vpmu.c
index 66a3815..3ac7d53 100644
--- a/xen/arch/x86/hvm/svm/vpmu.c
+++ b/xen/arch/x86/hvm/svm/vpmu.c
@@ -203,6 +203,8 @@ static void amd_vpmu_load(struct vcpu *v)
return;
}
+ vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
+
context_load(v);
}
diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c b/xen/arch/x86/hvm/vmx/vpmu_core2.c
index ee26362..8aa7cb2 100644
--- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
+++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
@@ -369,6 +369,8 @@ static void core2_vpmu_load(struct vcpu *v)
if ( vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
return;
+ vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
+
__core2_vpmu_load(v);
}
diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
index 21fbaba..63765fa 100644
--- a/xen/arch/x86/hvm/vpmu.c
+++ b/xen/arch/x86/hvm/vpmu.c
@@ -211,10 +211,9 @@ void vpmu_load(struct vcpu *v)
if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->arch_vpmu_load )
{
apic_write_around(APIC_LVTPC, vpmu->hw_lapic_lvtpc);
+ /* Arch code needs to set VPMU_CONTEXT_LOADED */
vpmu->arch_vpmu_ops->arch_vpmu_load(v);
}
-
- vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
}
void vpmu_initialise(struct vcpu *v)
--
1.8.3.1
^ permalink raw reply related [flat|nested] 44+ messages in thread
* [PATCH v5 RESEND 03/17] x86/VPMU: Minor VPMU cleanup
2014-04-23 12:50 [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Boris Ostrovsky
2014-04-23 12:50 ` [PATCH v5 RESEND 01/17] common/symbols: Export hypervisor symbols to privileged guest Boris Ostrovsky
2014-04-23 12:50 ` [PATCH v5 RESEND 02/17] VPMU: Mark context LOADED before registers are loaded Boris Ostrovsky
@ 2014-04-23 12:50 ` Boris Ostrovsky
2014-04-26 8:20 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 04/17] intel/VPMU: Clean up Intel VPMU code Boris Ostrovsky
` (15 subsequent siblings)
18 siblings, 1 reply; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-23 12:50 UTC (permalink / raw)
To: kevin.tian
Cc: keir, jun.nakajima, andrew.cooper3, eddie.dong, donald.d.dugger,
xen-devel, dietmar.hahn, JBeulich, boris.ostrovsky,
suravee.suthikulpanit
Update macros that modify VPMU flags to allow changing multiple bits at once.
Make sure that we only touch MSR bitmap on HVM guests (both VMX and SVM). This
is needed by subsequent PMU patches.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
xen/arch/x86/hvm/svm/vpmu.c | 14 +++++++++-----
xen/arch/x86/hvm/vmx/vpmu_core2.c | 9 +++------
xen/arch/x86/hvm/vpmu.c | 3 +--
xen/include/asm-x86/hvm/vpmu.h | 9 +++++----
4 files changed, 18 insertions(+), 17 deletions(-)
diff --git a/xen/arch/x86/hvm/svm/vpmu.c b/xen/arch/x86/hvm/svm/vpmu.c
index 3ac7d53..3666915 100644
--- a/xen/arch/x86/hvm/svm/vpmu.c
+++ b/xen/arch/x86/hvm/svm/vpmu.c
@@ -244,7 +244,8 @@ static int amd_vpmu_save(struct vcpu *v)
context_save(v);
- if ( !vpmu_is_set(vpmu, VPMU_RUNNING) && ctx->msr_bitmap_set )
+ if ( is_hvm_domain(v->domain) &&
+ !vpmu_is_set(vpmu, VPMU_RUNNING) && ctx->msr_bitmap_set )
amd_vpmu_unset_msr_bitmap(v);
return 1;
@@ -284,7 +285,7 @@ static int amd_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
struct vpmu_struct *vpmu = vcpu_vpmu(v);
/* For all counters, enable guest only mode for HVM guest */
- if ( (get_pmu_reg_type(msr) == MSR_TYPE_CTRL) &&
+ if ( is_hvm_domain(v->domain) && (get_pmu_reg_type(msr) == MSR_TYPE_CTRL) &&
!(is_guest_mode(msr_content)) )
{
set_guest_mode(msr_content);
@@ -300,7 +301,8 @@ static int amd_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
apic_write(APIC_LVTPC, PMU_APIC_VECTOR);
vpmu->hw_lapic_lvtpc = PMU_APIC_VECTOR;
- if ( !((struct amd_vpmu_context *)vpmu->context)->msr_bitmap_set )
+ if ( is_hvm_domain(v->domain) &&
+ !((struct amd_vpmu_context *)vpmu->context)->msr_bitmap_set )
amd_vpmu_set_msr_bitmap(v);
}
@@ -311,7 +313,8 @@ static int amd_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
apic_write(APIC_LVTPC, PMU_APIC_VECTOR | APIC_LVT_MASKED);
vpmu->hw_lapic_lvtpc = PMU_APIC_VECTOR | APIC_LVT_MASKED;
vpmu_reset(vpmu, VPMU_RUNNING);
- if ( ((struct amd_vpmu_context *)vpmu->context)->msr_bitmap_set )
+ if ( is_hvm_domain(v->domain) &&
+ ((struct amd_vpmu_context *)vpmu->context)->msr_bitmap_set )
amd_vpmu_unset_msr_bitmap(v);
release_pmu_ownship(PMU_OWNER_HVM);
}
@@ -403,7 +406,8 @@ static void amd_vpmu_destroy(struct vcpu *v)
if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
return;
- if ( ((struct amd_vpmu_context *)vpmu->context)->msr_bitmap_set )
+ if ( is_hvm_domain(v->domain) &&
+ ((struct amd_vpmu_context *)vpmu->context)->msr_bitmap_set )
amd_vpmu_unset_msr_bitmap(v);
xfree(vpmu->context);
diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c b/xen/arch/x86/hvm/vmx/vpmu_core2.c
index 8aa7cb2..1e32ff3 100644
--- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
+++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
@@ -326,10 +326,7 @@ static int core2_vpmu_save(struct vcpu *v)
{
struct vpmu_struct *vpmu = vcpu_vpmu(v);
- if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_SAVE) )
- return 0;
-
- if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
+ if ( !vpmu_is_set_all(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED) )
return 0;
__core2_vpmu_save(v);
@@ -448,7 +445,7 @@ static int core2_vpmu_msr_common_check(u32 msr_index, int *type, int *index)
{
__core2_vpmu_load(current);
vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
- if ( cpu_has_vmx_msr_bitmap )
+ if ( cpu_has_vmx_msr_bitmap && is_hvm_domain(current->domain) )
core2_vpmu_set_msr_bitmap(current->arch.hvm_vmx.msr_bitmap);
}
return 1;
@@ -815,7 +812,7 @@ static void core2_vpmu_destroy(struct vcpu *v)
return;
xfree(core2_vpmu_cxt->pmu_enable);
xfree(vpmu->context);
- if ( cpu_has_vmx_msr_bitmap )
+ if ( cpu_has_vmx_msr_bitmap && is_hvm_domain(v->domain) )
core2_vpmu_unset_msr_bitmap(v->arch.hvm_vmx.msr_bitmap);
release_pmu_ownship(PMU_OWNER_HVM);
vpmu_reset(vpmu, VPMU_CONTEXT_ALLOCATED);
diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
index 63765fa..a48dae2 100644
--- a/xen/arch/x86/hvm/vpmu.c
+++ b/xen/arch/x86/hvm/vpmu.c
@@ -143,8 +143,7 @@ void vpmu_save(struct vcpu *v)
struct vpmu_struct *vpmu = vcpu_vpmu(v);
int pcpu = smp_processor_id();
- if ( !(vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) &&
- vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED)) )
+ if ( !vpmu_is_set_all(vpmu, VPMU_CONTEXT_ALLOCATED | VPMU_CONTEXT_LOADED) )
return;
vpmu->last_pcpu = pcpu;
diff --git a/xen/include/asm-x86/hvm/vpmu.h b/xen/include/asm-x86/hvm/vpmu.h
index 40f63fb..2a713be 100644
--- a/xen/include/asm-x86/hvm/vpmu.h
+++ b/xen/include/asm-x86/hvm/vpmu.h
@@ -81,10 +81,11 @@ struct vpmu_struct {
#define VPMU_CPU_HAS_BTS 0x200 /* Has Branch Trace Store */
-#define vpmu_set(_vpmu, _x) ((_vpmu)->flags |= (_x))
-#define vpmu_reset(_vpmu, _x) ((_vpmu)->flags &= ~(_x))
-#define vpmu_is_set(_vpmu, _x) ((_vpmu)->flags & (_x))
-#define vpmu_clear(_vpmu) ((_vpmu)->flags = 0)
+#define vpmu_set(_vpmu, _x) ((_vpmu)->flags |= (_x))
+#define vpmu_reset(_vpmu, _x) ((_vpmu)->flags &= ~(_x))
+#define vpmu_is_set(_vpmu, _x) ((_vpmu)->flags & (_x))
+#define vpmu_is_set_all(_vpmu, _x) (((_vpmu)->flags & (_x)) == (_x))
+#define vpmu_clear(_vpmu) ((_vpmu)->flags = 0)
int vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content);
int vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content);
--
1.8.3.1
^ permalink raw reply related [flat|nested] 44+ messages in thread
* [PATCH v5 RESEND 04/17] intel/VPMU: Clean up Intel VPMU code
2014-04-23 12:50 [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Boris Ostrovsky
` (2 preceding siblings ...)
2014-04-23 12:50 ` [PATCH v5 RESEND 03/17] x86/VPMU: Minor VPMU cleanup Boris Ostrovsky
@ 2014-04-23 12:50 ` Boris Ostrovsky
2014-04-26 8:20 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 05/17] x86/VPMU: Handle APIC_LVTPC accesses Boris Ostrovsky
` (14 subsequent siblings)
18 siblings, 1 reply; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-23 12:50 UTC (permalink / raw)
To: kevin.tian
Cc: keir, jun.nakajima, andrew.cooper3, eddie.dong, donald.d.dugger,
xen-devel, dietmar.hahn, JBeulich, boris.ostrovsky,
suravee.suthikulpanit
Remove struct pmumsr and core2_pmu_enable. Replace static MSR structures with
fields in core2_vpmu_context.
Call core2_get_pmc_count() once, during initialization.
Properly clean up when core2_vpmu_alloc_resource() fails and add routines
to remove MSRs from VMCS.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
xen/arch/x86/hvm/vmx/vmcs.c | 55 ++++++
xen/arch/x86/hvm/vmx/vpmu_core2.c | 310 ++++++++++++++-----------------
xen/include/asm-x86/hvm/vmx/vmcs.h | 2 +
xen/include/asm-x86/hvm/vmx/vpmu_core2.h | 19 --
4 files changed, 199 insertions(+), 187 deletions(-)
diff --git a/xen/arch/x86/hvm/vmx/vmcs.c b/xen/arch/x86/hvm/vmx/vmcs.c
index 44f33cb..5f86b17 100644
--- a/xen/arch/x86/hvm/vmx/vmcs.c
+++ b/xen/arch/x86/hvm/vmx/vmcs.c
@@ -1205,6 +1205,34 @@ int vmx_add_guest_msr(u32 msr)
return 0;
}
+void vmx_rm_guest_msr(u32 msr)
+{
+ struct vcpu *curr = current;
+ unsigned int idx, msr_count = curr->arch.hvm_vmx.msr_count;
+ struct vmx_msr_entry *msr_area = curr->arch.hvm_vmx.msr_area;
+
+ if ( msr_area == NULL )
+ return;
+
+ for ( idx = 0; idx < msr_count; idx++ )
+ if ( msr_area[idx].index == msr )
+ break;
+
+ if ( idx == msr_count )
+ return;
+
+ for ( ; idx < msr_count - 1; idx++ )
+ {
+ msr_area[idx].index = msr_area[idx + 1].index;
+ msr_area[idx].data = msr_area[idx + 1].data;
+ }
+ msr_area[msr_count - 1].index = 0;
+
+ curr->arch.hvm_vmx.msr_count = --msr_count;
+ __vmwrite(VM_EXIT_MSR_STORE_COUNT, msr_count);
+ __vmwrite(VM_ENTRY_MSR_LOAD_COUNT, msr_count);
+}
+
int vmx_add_host_load_msr(u32 msr)
{
struct vcpu *curr = current;
@@ -1235,6 +1263,33 @@ int vmx_add_host_load_msr(u32 msr)
return 0;
}
+void vmx_rm_host_load_msr(u32 msr)
+{
+ struct vcpu *curr = current;
+ unsigned int idx, msr_count = curr->arch.hvm_vmx.host_msr_count;
+ struct vmx_msr_entry *msr_area = curr->arch.hvm_vmx.host_msr_area;
+
+ if ( msr_area == NULL )
+ return;
+
+ for ( idx = 0; idx < msr_count; idx++ )
+ if ( msr_area[idx].index == msr )
+ break;
+
+ if ( idx == msr_count )
+ return;
+
+ for ( ; idx < msr_count - 1; idx++ )
+ {
+ msr_area[idx].index = msr_area[idx + 1].index;
+ msr_area[idx].data = msr_area[idx + 1].data;
+ }
+ msr_area[msr_count - 1].index = 0;
+
+ curr->arch.hvm_vmx.host_msr_count = --msr_count;
+ __vmwrite(VM_EXIT_MSR_LOAD_COUNT, msr_count);
+}
+
void vmx_set_eoi_exit_bitmap(struct vcpu *v, u8 vector)
{
if ( !test_and_set_bit(vector, v->arch.hvm_vmx.eoi_exit_bitmap) )
diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c b/xen/arch/x86/hvm/vmx/vpmu_core2.c
index 1e32ff3..513eca4 100644
--- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
+++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
@@ -69,6 +69,26 @@
static bool_t __read_mostly full_width_write;
/*
+ * MSR_CORE_PERF_FIXED_CTR_CTRL contains the configuration of all fixed
+ * counters. 4 bits for every counter.
+ */
+#define FIXED_CTR_CTRL_BITS 4
+#define FIXED_CTR_CTRL_MASK ((1 << FIXED_CTR_CTRL_BITS) - 1)
+
+#define VPMU_CORE2_MAX_FIXED_PMCS 4
+struct core2_vpmu_context {
+ u64 fixed_ctrl;
+ u64 ds_area;
+ u64 pebs_enable;
+ u64 global_ovf_status;
+ u64 fix_counters[VPMU_CORE2_MAX_FIXED_PMCS];
+ struct arch_msr_pair arch_msr_pair[1];
+};
+
+/* Number of general-purpose and fixed performance counters */
+static unsigned int __read_mostly arch_pmc_cnt, fixed_pmc_cnt;
+
+/*
* QUIRK to workaround an issue on various family 6 cpus.
* The issue leads to endless PMC interrupt loops on the processor.
* If the interrupt handler is running and a pmc reaches the value 0, this
@@ -88,11 +108,8 @@ static void check_pmc_quirk(void)
is_pmc_quirk = 0;
}
-static int core2_get_pmc_count(void);
static void handle_pmc_quirk(u64 msr_content)
{
- int num_gen_pmc = core2_get_pmc_count();
- int num_fix_pmc = 3;
int i;
u64 val;
@@ -100,7 +117,7 @@ static void handle_pmc_quirk(u64 msr_content)
return;
val = msr_content;
- for ( i = 0; i < num_gen_pmc; i++ )
+ for ( i = 0; i < arch_pmc_cnt; i++ )
{
if ( val & 0x1 )
{
@@ -112,7 +129,7 @@ static void handle_pmc_quirk(u64 msr_content)
val >>= 1;
}
val = msr_content >> 32;
- for ( i = 0; i < num_fix_pmc; i++ )
+ for ( i = 0; i < fixed_pmc_cnt; i++ )
{
if ( val & 0x1 )
{
@@ -125,75 +142,42 @@ static void handle_pmc_quirk(u64 msr_content)
}
}
-static const u32 core2_fix_counters_msr[] = {
- MSR_CORE_PERF_FIXED_CTR0,
- MSR_CORE_PERF_FIXED_CTR1,
- MSR_CORE_PERF_FIXED_CTR2
-};
-
/*
- * MSR_CORE_PERF_FIXED_CTR_CTRL contains the configuration of all fixed
- * counters. 4 bits for every counter.
+ * Read the number of general counters via CPUID.EAX[0xa].EAX[8..15]
*/
-#define FIXED_CTR_CTRL_BITS 4
-#define FIXED_CTR_CTRL_MASK ((1 << FIXED_CTR_CTRL_BITS) - 1)
-
-/* The index into the core2_ctrls_msr[] of this MSR used in core2_vpmu_dump() */
-#define MSR_CORE_PERF_FIXED_CTR_CTRL_IDX 0
-
-/* Core 2 Non-architectual Performance Control MSRs. */
-static const u32 core2_ctrls_msr[] = {
- MSR_CORE_PERF_FIXED_CTR_CTRL,
- MSR_IA32_PEBS_ENABLE,
- MSR_IA32_DS_AREA
-};
-
-struct pmumsr {
- unsigned int num;
- const u32 *msr;
-};
-
-static const struct pmumsr core2_fix_counters = {
- VPMU_CORE2_NUM_FIXED,
- core2_fix_counters_msr
-};
+static int core2_get_arch_pmc_count(void)
+{
+ u32 eax;
-static const struct pmumsr core2_ctrls = {
- VPMU_CORE2_NUM_CTRLS,
- core2_ctrls_msr
-};
-static int arch_pmc_cnt;
+ eax = cpuid_eax(0xa);
+ return ( (eax & PMU_GENERAL_NR_MASK) >> PMU_GENERAL_NR_SHIFT );
+}
/*
- * Read the number of general counters via CPUID.EAX[0xa].EAX[8..15]
+ * Read the number of fixed counters via CPUID.EDX[0xa].EDX[0..4]
*/
-static int core2_get_pmc_count(void)
+static int core2_get_fixed_pmc_count(void)
{
- u32 eax, ebx, ecx, edx;
-
- if ( arch_pmc_cnt == 0 )
- {
- cpuid(0xa, &eax, &ebx, &ecx, &edx);
- arch_pmc_cnt = (eax & PMU_GENERAL_NR_MASK) >> PMU_GENERAL_NR_SHIFT;
- }
+ u32 eax;
- return arch_pmc_cnt;
+ eax = cpuid_eax(0xa);
+ return ( (eax & PMU_FIXED_NR_MASK) >> PMU_FIXED_NR_SHIFT );
}
static u64 core2_calc_intial_glb_ctrl_msr(void)
{
- int arch_pmc_bits = (1 << core2_get_pmc_count()) - 1;
- u64 fix_pmc_bits = (1 << 3) - 1;
- return ((fix_pmc_bits << 32) | arch_pmc_bits);
+ int arch_pmc_bits = (1 << arch_pmc_cnt) - 1;
+ u64 fix_pmc_bits = (1 << fixed_pmc_cnt) - 1;
+ return ( (fix_pmc_bits << 32) | arch_pmc_bits );
}
/* edx bits 5-12: Bit width of fixed-function performance counters */
static int core2_get_bitwidth_fix_count(void)
{
- u32 eax, ebx, ecx, edx;
+ u32 edx;
- cpuid(0xa, &eax, &ebx, &ecx, &edx);
- return ((edx & PMU_FIXED_WIDTH_MASK) >> PMU_FIXED_WIDTH_SHIFT);
+ edx = cpuid_edx(0xa);
+ return ( (edx & PMU_FIXED_WIDTH_MASK) >> PMU_FIXED_WIDTH_SHIFT );
}
static int is_core2_vpmu_msr(u32 msr_index, int *type, int *index)
@@ -201,9 +185,9 @@ static int is_core2_vpmu_msr(u32 msr_index, int *type, int *index)
int i;
u32 msr_index_pmc;
- for ( i = 0; i < core2_fix_counters.num; i++ )
+ for ( i = 0; i < fixed_pmc_cnt; i++ )
{
- if ( core2_fix_counters.msr[i] == msr_index )
+ if ( msr_index == MSR_CORE_PERF_FIXED_CTR0 + i )
{
*type = MSR_TYPE_COUNTER;
*index = i;
@@ -211,14 +195,12 @@ static int is_core2_vpmu_msr(u32 msr_index, int *type, int *index)
}
}
- for ( i = 0; i < core2_ctrls.num; i++ )
+ if ( (msr_index == MSR_CORE_PERF_FIXED_CTR_CTRL ) ||
+ (msr_index == MSR_IA32_DS_AREA) ||
+ (msr_index == MSR_IA32_PEBS_ENABLE) )
{
- if ( core2_ctrls.msr[i] == msr_index )
- {
- *type = MSR_TYPE_CTRL;
- *index = i;
- return 1;
- }
+ *type = MSR_TYPE_CTRL;
+ return 1;
}
if ( (msr_index == MSR_CORE_PERF_GLOBAL_CTRL) ||
@@ -231,7 +213,7 @@ static int is_core2_vpmu_msr(u32 msr_index, int *type, int *index)
msr_index_pmc = msr_index & MSR_PMC_ALIAS_MASK;
if ( (msr_index_pmc >= MSR_IA32_PERFCTR0) &&
- (msr_index_pmc < (MSR_IA32_PERFCTR0 + core2_get_pmc_count())) )
+ (msr_index_pmc < (MSR_IA32_PERFCTR0 + arch_pmc_cnt)) )
{
*type = MSR_TYPE_ARCH_COUNTER;
*index = msr_index_pmc - MSR_IA32_PERFCTR0;
@@ -239,7 +221,7 @@ static int is_core2_vpmu_msr(u32 msr_index, int *type, int *index)
}
if ( (msr_index >= MSR_P6_EVNTSEL0) &&
- (msr_index < (MSR_P6_EVNTSEL0 + core2_get_pmc_count())) )
+ (msr_index < (MSR_P6_EVNTSEL0 + arch_pmc_cnt)) )
{
*type = MSR_TYPE_ARCH_CTRL;
*index = msr_index - MSR_P6_EVNTSEL0;
@@ -254,13 +236,13 @@ static void core2_vpmu_set_msr_bitmap(unsigned long *msr_bitmap)
int i;
/* Allow Read/Write PMU Counters MSR Directly. */
- for ( i = 0; i < core2_fix_counters.num; i++ )
+ for ( i = 0; i < fixed_pmc_cnt; i++ )
{
- clear_bit(msraddr_to_bitpos(core2_fix_counters.msr[i]), msr_bitmap);
- clear_bit(msraddr_to_bitpos(core2_fix_counters.msr[i]),
+ clear_bit(msraddr_to_bitpos(MSR_CORE_PERF_FIXED_CTR0 + i), msr_bitmap);
+ clear_bit(msraddr_to_bitpos(MSR_CORE_PERF_FIXED_CTR0 + i),
msr_bitmap + 0x800/BYTES_PER_LONG);
}
- for ( i = 0; i < core2_get_pmc_count(); i++ )
+ for ( i = 0; i < arch_pmc_cnt; i++ )
{
clear_bit(msraddr_to_bitpos(MSR_IA32_PERFCTR0+i), msr_bitmap);
clear_bit(msraddr_to_bitpos(MSR_IA32_PERFCTR0+i),
@@ -275,26 +257,28 @@ static void core2_vpmu_set_msr_bitmap(unsigned long *msr_bitmap)
}
/* Allow Read PMU Non-global Controls Directly. */
- for ( i = 0; i < core2_ctrls.num; i++ )
- clear_bit(msraddr_to_bitpos(core2_ctrls.msr[i]), msr_bitmap);
- for ( i = 0; i < core2_get_pmc_count(); i++ )
- clear_bit(msraddr_to_bitpos(MSR_P6_EVNTSEL0+i), msr_bitmap);
+ for ( i = 0; i < arch_pmc_cnt; i++ )
+ clear_bit(msraddr_to_bitpos(MSR_P6_EVNTSEL0 + i), msr_bitmap);
+
+ clear_bit(msraddr_to_bitpos(MSR_CORE_PERF_FIXED_CTR_CTRL), msr_bitmap);
+ clear_bit(msraddr_to_bitpos(MSR_IA32_PEBS_ENABLE), msr_bitmap);
+ clear_bit(msraddr_to_bitpos(MSR_IA32_DS_AREA), msr_bitmap);
}
static void core2_vpmu_unset_msr_bitmap(unsigned long *msr_bitmap)
{
int i;
- for ( i = 0; i < core2_fix_counters.num; i++ )
+ for ( i = 0; i < fixed_pmc_cnt; i++ )
{
- set_bit(msraddr_to_bitpos(core2_fix_counters.msr[i]), msr_bitmap);
- set_bit(msraddr_to_bitpos(core2_fix_counters.msr[i]),
+ set_bit(msraddr_to_bitpos(MSR_CORE_PERF_FIXED_CTR0 + i), msr_bitmap);
+ set_bit(msraddr_to_bitpos(MSR_CORE_PERF_FIXED_CTR0 + i),
msr_bitmap + 0x800/BYTES_PER_LONG);
}
- for ( i = 0; i < core2_get_pmc_count(); i++ )
+ for ( i = 0; i < arch_pmc_cnt; i++ )
{
- set_bit(msraddr_to_bitpos(MSR_IA32_PERFCTR0+i), msr_bitmap);
- set_bit(msraddr_to_bitpos(MSR_IA32_PERFCTR0+i),
+ set_bit(msraddr_to_bitpos(MSR_IA32_PERFCTR0 + i), msr_bitmap);
+ set_bit(msraddr_to_bitpos(MSR_IA32_PERFCTR0 + i),
msr_bitmap + 0x800/BYTES_PER_LONG);
if ( full_width_write )
@@ -305,10 +289,12 @@ static void core2_vpmu_unset_msr_bitmap(unsigned long *msr_bitmap)
}
}
- for ( i = 0; i < core2_ctrls.num; i++ )
- set_bit(msraddr_to_bitpos(core2_ctrls.msr[i]), msr_bitmap);
- for ( i = 0; i < core2_get_pmc_count(); i++ )
- set_bit(msraddr_to_bitpos(MSR_P6_EVNTSEL0+i), msr_bitmap);
+ for ( i = 0; i < arch_pmc_cnt; i++ )
+ set_bit(msraddr_to_bitpos(MSR_P6_EVNTSEL0 + i), msr_bitmap);
+
+ set_bit(msraddr_to_bitpos(MSR_CORE_PERF_FIXED_CTR_CTRL), msr_bitmap);
+ set_bit(msraddr_to_bitpos(MSR_IA32_PEBS_ENABLE), msr_bitmap);
+ set_bit(msraddr_to_bitpos(MSR_IA32_DS_AREA), msr_bitmap);
}
static inline void __core2_vpmu_save(struct vcpu *v)
@@ -316,10 +302,10 @@ static inline void __core2_vpmu_save(struct vcpu *v)
int i;
struct core2_vpmu_context *core2_vpmu_cxt = vcpu_vpmu(v)->context;
- for ( i = 0; i < core2_fix_counters.num; i++ )
- rdmsrl(core2_fix_counters.msr[i], core2_vpmu_cxt->fix_counters[i]);
- for ( i = 0; i < core2_get_pmc_count(); i++ )
- rdmsrl(MSR_IA32_PERFCTR0+i, core2_vpmu_cxt->arch_msr_pair[i].counter);
+ for ( i = 0; i < fixed_pmc_cnt; i++ )
+ rdmsrl(MSR_CORE_PERF_FIXED_CTR0 + i, core2_vpmu_cxt->fix_counters[i]);
+ for ( i = 0; i < arch_pmc_cnt; i++ )
+ rdmsrl(MSR_IA32_PERFCTR0 + i, core2_vpmu_cxt->arch_msr_pair[i].counter);
}
static int core2_vpmu_save(struct vcpu *v)
@@ -343,20 +329,22 @@ static inline void __core2_vpmu_load(struct vcpu *v)
unsigned int i, pmc_start;
struct core2_vpmu_context *core2_vpmu_cxt = vcpu_vpmu(v)->context;
- for ( i = 0; i < core2_fix_counters.num; i++ )
- wrmsrl(core2_fix_counters.msr[i], core2_vpmu_cxt->fix_counters[i]);
+ for ( i = 0; i < fixed_pmc_cnt; i++ )
+ wrmsrl(MSR_CORE_PERF_FIXED_CTR0 + i, core2_vpmu_cxt->fix_counters[i]);
if ( full_width_write )
pmc_start = MSR_IA32_A_PERFCTR0;
else
pmc_start = MSR_IA32_PERFCTR0;
- for ( i = 0; i < core2_get_pmc_count(); i++ )
+ for ( i = 0; i < arch_pmc_cnt; i++ )
+ {
wrmsrl(pmc_start + i, core2_vpmu_cxt->arch_msr_pair[i].counter);
+ wrmsrl(MSR_P6_EVNTSEL0 + i, core2_vpmu_cxt->arch_msr_pair[i].control);
+ }
- for ( i = 0; i < core2_ctrls.num; i++ )
- wrmsrl(core2_ctrls.msr[i], core2_vpmu_cxt->ctrls[i]);
- for ( i = 0; i < core2_get_pmc_count(); i++ )
- wrmsrl(MSR_P6_EVNTSEL0+i, core2_vpmu_cxt->arch_msr_pair[i].control);
+ wrmsrl(MSR_CORE_PERF_FIXED_CTR_CTRL, core2_vpmu_cxt->fixed_ctrl);
+ wrmsrl(MSR_IA32_DS_AREA, core2_vpmu_cxt->ds_area);
+ wrmsrl(MSR_IA32_PEBS_ENABLE, core2_vpmu_cxt->pebs_enable);
}
static void core2_vpmu_load(struct vcpu *v)
@@ -375,56 +363,39 @@ static int core2_vpmu_alloc_resource(struct vcpu *v)
{
struct vpmu_struct *vpmu = vcpu_vpmu(v);
struct core2_vpmu_context *core2_vpmu_cxt;
- struct core2_pmu_enable *pmu_enable;
if ( !acquire_pmu_ownership(PMU_OWNER_HVM) )
return 0;
wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0);
if ( vmx_add_host_load_msr(MSR_CORE_PERF_GLOBAL_CTRL) )
- return 0;
+ goto out_err;
if ( vmx_add_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL) )
- return 0;
+ goto out_err;
vmx_write_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL,
core2_calc_intial_glb_ctrl_msr());
- pmu_enable = xzalloc_bytes(sizeof(struct core2_pmu_enable) +
- core2_get_pmc_count() - 1);
- if ( !pmu_enable )
- goto out1;
-
core2_vpmu_cxt = xzalloc_bytes(sizeof(struct core2_vpmu_context) +
- (core2_get_pmc_count()-1)*sizeof(struct arch_msr_pair));
+ (arch_pmc_cnt-1)*sizeof(struct arch_msr_pair));
if ( !core2_vpmu_cxt )
- goto out2;
- core2_vpmu_cxt->pmu_enable = pmu_enable;
+ goto out_err;
+
vpmu->context = (void *)core2_vpmu_cxt;
+ vpmu_set(vpmu, VPMU_CONTEXT_ALLOCATED);
+
return 1;
- out2:
- xfree(pmu_enable);
- out1:
- gdprintk(XENLOG_WARNING, "Insufficient memory for PMU, PMU feature is "
- "unavailable on domain %d vcpu %d.\n",
- v->vcpu_id, v->domain->domain_id);
- return 0;
-}
-static void core2_vpmu_save_msr_context(struct vcpu *v, int type,
- int index, u64 msr_data)
-{
- struct core2_vpmu_context *core2_vpmu_cxt = vcpu_vpmu(v)->context;
+out_err:
+ vmx_rm_host_load_msr(MSR_CORE_PERF_GLOBAL_CTRL);
+ vmx_rm_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL);
+ release_pmu_ownship(PMU_OWNER_HVM);
- switch ( type )
- {
- case MSR_TYPE_CTRL:
- core2_vpmu_cxt->ctrls[index] = msr_data;
- break;
- case MSR_TYPE_ARCH_CTRL:
- core2_vpmu_cxt->arch_msr_pair[index].control = msr_data;
- break;
- }
+ printk("Failed to allocate VPMU resources for domain %u vcpu %u\n",
+ v->vcpu_id, v->domain->domain_id);
+
+ return 0;
}
static int core2_vpmu_msr_common_check(u32 msr_index, int *type, int *index)
@@ -435,10 +406,8 @@ static int core2_vpmu_msr_common_check(u32 msr_index, int *type, int *index)
return 0;
if ( unlikely(!vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED)) &&
- (vpmu->context != NULL ||
- !core2_vpmu_alloc_resource(current)) )
+ !core2_vpmu_alloc_resource(current) )
return 0;
- vpmu_set(vpmu, VPMU_CONTEXT_ALLOCATED);
/* Do the lazy load staff. */
if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
@@ -454,7 +423,7 @@ static int core2_vpmu_msr_common_check(u32 msr_index, int *type, int *index)
static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
{
u64 global_ctrl, non_global_ctrl;
- char pmu_enable = 0;
+ unsigned pmu_enable = 0;
int i, tmp;
int type = -1, index = -1;
struct vcpu *v = current;
@@ -499,6 +468,7 @@ static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
if ( msr_content & 1 )
gdprintk(XENLOG_WARNING, "Guest is trying to enable PEBS, "
"which is not supported.\n");
+ core2_vpmu_cxt->pebs_enable = msr_content;
return 1;
case MSR_IA32_DS_AREA:
if ( vpmu_is_set(vpmu, VPMU_CPU_HAS_DS) )
@@ -511,27 +481,25 @@ static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
hvm_inject_hw_exception(TRAP_gp_fault, 0);
return 1;
}
- core2_vpmu_cxt->pmu_enable->ds_area_enable = msr_content ? 1 : 0;
+ core2_vpmu_cxt->ds_area = msr_content;
break;
}
gdprintk(XENLOG_WARNING, "Guest setting of DTS is ignored.\n");
return 1;
case MSR_CORE_PERF_GLOBAL_CTRL:
global_ctrl = msr_content;
- for ( i = 0; i < core2_get_pmc_count(); i++ )
+ for ( i = 0; i < arch_pmc_cnt; i++ )
{
rdmsrl(MSR_P6_EVNTSEL0+i, non_global_ctrl);
- core2_vpmu_cxt->pmu_enable->arch_pmc_enable[i] =
- global_ctrl & (non_global_ctrl >> 22) & 1;
+ pmu_enable += global_ctrl & (non_global_ctrl >> 22) & 1;
global_ctrl >>= 1;
}
rdmsrl(MSR_CORE_PERF_FIXED_CTR_CTRL, non_global_ctrl);
global_ctrl = msr_content >> 32;
- for ( i = 0; i < core2_fix_counters.num; i++ )
+ for ( i = 0; i < fixed_pmc_cnt; i++ )
{
- core2_vpmu_cxt->pmu_enable->fixed_ctr_enable[i] =
- (global_ctrl & 1) & ((non_global_ctrl & 0x3)? 1: 0);
+ pmu_enable += (global_ctrl & 1) & ((non_global_ctrl & 0x3)? 1 : 0);
non_global_ctrl >>= FIXED_CTR_CTRL_BITS;
global_ctrl >>= 1;
}
@@ -540,27 +508,27 @@ static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
non_global_ctrl = msr_content;
vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, &global_ctrl);
global_ctrl >>= 32;
- for ( i = 0; i < core2_fix_counters.num; i++ )
+ for ( i = 0; i < fixed_pmc_cnt; i++ )
{
- core2_vpmu_cxt->pmu_enable->fixed_ctr_enable[i] =
- (global_ctrl & 1) & ((non_global_ctrl & 0x3)? 1: 0);
+ pmu_enable += (global_ctrl & 1) & ((non_global_ctrl & 0x3)? 1 : 0);
non_global_ctrl >>= 4;
global_ctrl >>= 1;
}
+ core2_vpmu_cxt->fixed_ctrl = msr_content;
break;
default:
tmp = msr - MSR_P6_EVNTSEL0;
- vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, &global_ctrl);
- if ( tmp >= 0 && tmp < core2_get_pmc_count() )
- core2_vpmu_cxt->pmu_enable->arch_pmc_enable[tmp] =
- (global_ctrl >> tmp) & (msr_content >> 22) & 1;
+ if ( tmp >= 0 && tmp < arch_pmc_cnt )
+ {
+ vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, &global_ctrl);
+ core2_vpmu_cxt->arch_msr_pair[tmp].control = msr_content;
+ for ( i = 0; i < arch_pmc_cnt && !pmu_enable; i++ )
+ pmu_enable += (global_ctrl >> i) &
+ (core2_vpmu_cxt->arch_msr_pair[i].control >> 22) & 1;
+ }
}
- for ( i = 0; i < core2_fix_counters.num; i++ )
- pmu_enable |= core2_vpmu_cxt->pmu_enable->fixed_ctr_enable[i];
- for ( i = 0; i < core2_get_pmc_count(); i++ )
- pmu_enable |= core2_vpmu_cxt->pmu_enable->arch_pmc_enable[i];
- pmu_enable |= core2_vpmu_cxt->pmu_enable->ds_area_enable;
+ pmu_enable += (core2_vpmu_cxt->ds_area != 0);
if ( pmu_enable )
vpmu_set(vpmu, VPMU_RUNNING);
else
@@ -579,7 +547,6 @@ static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
vpmu->hw_lapic_lvtpc = PMU_APIC_VECTOR | APIC_LVT_MASKED;
}
- core2_vpmu_save_msr_context(v, type, index, msr_content);
if ( type != MSR_TYPE_GLOBAL )
{
u64 mask;
@@ -595,7 +562,7 @@ static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
if ( msr == MSR_IA32_DS_AREA )
break;
/* 4 bits per counter, currently 3 fixed counters implemented. */
- mask = ~((1ull << (VPMU_CORE2_NUM_FIXED * FIXED_CTR_CTRL_BITS)) - 1);
+ mask = ~((1ull << (fixed_pmc_cnt * FIXED_CTR_CTRL_BITS)) - 1);
if (msr_content & mask)
inject_gp = 1;
break;
@@ -680,7 +647,7 @@ static void core2_vpmu_do_cpuid(unsigned int input,
static void core2_vpmu_dump(const struct vcpu *v)
{
const struct vpmu_struct *vpmu = vcpu_vpmu(v);
- int i, num;
+ int i;
const struct core2_vpmu_context *core2_vpmu_cxt = NULL;
u64 val;
@@ -698,27 +665,25 @@ static void core2_vpmu_dump(const struct vcpu *v)
printk(" vPMU running\n");
core2_vpmu_cxt = vpmu->context;
- num = core2_get_pmc_count();
+
/* Print the contents of the counter and its configuration msr. */
- for ( i = 0; i < num; i++ )
+ for ( i = 0; i < arch_pmc_cnt; i++ )
{
const struct arch_msr_pair *msr_pair = core2_vpmu_cxt->arch_msr_pair;
- if ( core2_vpmu_cxt->pmu_enable->arch_pmc_enable[i] )
- printk(" general_%d: 0x%016lx ctrl: 0x%016lx\n",
- i, msr_pair[i].counter, msr_pair[i].control);
+ printk(" general_%d: 0x%016lx ctrl: 0x%016lx\n",
+ i, msr_pair[i].counter, msr_pair[i].control);
}
/*
* The configuration of the fixed counter is 4 bits each in the
* MSR_CORE_PERF_FIXED_CTR_CTRL.
*/
- val = core2_vpmu_cxt->ctrls[MSR_CORE_PERF_FIXED_CTR_CTRL_IDX];
- for ( i = 0; i < core2_fix_counters.num; i++ )
+ val = core2_vpmu_cxt->fixed_ctrl;
+ for ( i = 0; i < fixed_pmc_cnt; i++ )
{
- if ( core2_vpmu_cxt->pmu_enable->fixed_ctr_enable[i] )
- printk(" fixed_%d: 0x%016lx ctrl: %#lx\n",
- i, core2_vpmu_cxt->fix_counters[i],
- val & FIXED_CTR_CTRL_MASK);
+ printk(" fixed_%d: 0x%016lx ctrl: %#lx\n",
+ i, core2_vpmu_cxt->fix_counters[i],
+ val & FIXED_CTR_CTRL_MASK);
val >>= FIXED_CTR_CTRL_BITS;
}
}
@@ -736,7 +701,7 @@ static int core2_vpmu_do_interrupt(struct cpu_user_regs *regs)
if ( is_pmc_quirk )
handle_pmc_quirk(msr_content);
core2_vpmu_cxt->global_ovf_status |= msr_content;
- msr_content = 0xC000000700000000 | ((1 << core2_get_pmc_count()) - 1);
+ msr_content = 0xC000000700000000 | ((1 << arch_pmc_cnt) - 1);
wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, msr_content);
}
else
@@ -799,18 +764,27 @@ static int core2_vpmu_initialise(struct vcpu *v, unsigned int vpmu_flags)
}
}
func_out:
+
+ arch_pmc_cnt = core2_get_arch_pmc_count();
+ fixed_pmc_cnt = core2_get_fixed_pmc_count();
+ if ( fixed_pmc_cnt > VPMU_CORE2_MAX_FIXED_PMCS )
+ {
+ fixed_pmc_cnt = VPMU_CORE2_MAX_FIXED_PMCS;
+ printk(XENLOG_G_WARNING "Limiting number of fixed counters to %d\n",
+ fixed_pmc_cnt);
+ }
check_pmc_quirk();
+
return 0;
}
static void core2_vpmu_destroy(struct vcpu *v)
{
struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct core2_vpmu_context *core2_vpmu_cxt = vpmu->context;
if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
return;
- xfree(core2_vpmu_cxt->pmu_enable);
+
xfree(vpmu->context);
if ( cpu_has_vmx_msr_bitmap && is_hvm_domain(v->domain) )
core2_vpmu_unset_msr_bitmap(v->arch.hvm_vmx.msr_bitmap);
diff --git a/xen/include/asm-x86/hvm/vmx/vmcs.h b/xen/include/asm-x86/hvm/vmx/vmcs.h
index ebaba5c..ed81cfb 100644
--- a/xen/include/asm-x86/hvm/vmx/vmcs.h
+++ b/xen/include/asm-x86/hvm/vmx/vmcs.h
@@ -473,7 +473,9 @@ void vmx_enable_intercept_for_msr(struct vcpu *v, u32 msr, int type);
int vmx_read_guest_msr(u32 msr, u64 *val);
int vmx_write_guest_msr(u32 msr, u64 val);
int vmx_add_guest_msr(u32 msr);
+void vmx_rm_guest_msr(u32 msr);
int vmx_add_host_load_msr(u32 msr);
+void vmx_rm_host_load_msr(u32 msr);
void vmx_vmcs_switch(struct vmcs_struct *from, struct vmcs_struct *to);
void vmx_set_eoi_exit_bitmap(struct vcpu *v, u8 vector);
void vmx_clear_eoi_exit_bitmap(struct vcpu *v, u8 vector);
diff --git a/xen/include/asm-x86/hvm/vmx/vpmu_core2.h b/xen/include/asm-x86/hvm/vmx/vpmu_core2.h
index 60b05fd..410372d 100644
--- a/xen/include/asm-x86/hvm/vmx/vpmu_core2.h
+++ b/xen/include/asm-x86/hvm/vmx/vpmu_core2.h
@@ -23,29 +23,10 @@
#ifndef __ASM_X86_HVM_VPMU_CORE_H_
#define __ASM_X86_HVM_VPMU_CORE_H_
-/* Currently only 3 fixed counters are supported. */
-#define VPMU_CORE2_NUM_FIXED 3
-/* Currently only 3 Non-architectual Performance Control MSRs */
-#define VPMU_CORE2_NUM_CTRLS 3
-
struct arch_msr_pair {
u64 counter;
u64 control;
};
-struct core2_pmu_enable {
- char ds_area_enable;
- char fixed_ctr_enable[VPMU_CORE2_NUM_FIXED];
- char arch_pmc_enable[1];
-};
-
-struct core2_vpmu_context {
- struct core2_pmu_enable *pmu_enable;
- u64 fix_counters[VPMU_CORE2_NUM_FIXED];
- u64 ctrls[VPMU_CORE2_NUM_CTRLS];
- u64 global_ovf_status;
- struct arch_msr_pair arch_msr_pair[1];
-};
-
#endif /* __ASM_X86_HVM_VPMU_CORE_H_ */
--
1.8.3.1
^ permalink raw reply related [flat|nested] 44+ messages in thread
* [PATCH v5 RESEND 05/17] x86/VPMU: Handle APIC_LVTPC accesses
2014-04-23 12:50 [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Boris Ostrovsky
` (3 preceding siblings ...)
2014-04-23 12:50 ` [PATCH v5 RESEND 04/17] intel/VPMU: Clean up Intel VPMU code Boris Ostrovsky
@ 2014-04-23 12:50 ` Boris Ostrovsky
2014-04-26 8:20 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 06/17] intel/VPMU: MSR_CORE_PERF_GLOBAL_CTRL should be initialized to zero Boris Ostrovsky
` (13 subsequent siblings)
18 siblings, 1 reply; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-23 12:50 UTC (permalink / raw)
To: kevin.tian
Cc: keir, jun.nakajima, andrew.cooper3, eddie.dong, donald.d.dugger,
xen-devel, dietmar.hahn, JBeulich, boris.ostrovsky,
suravee.suthikulpanit
Update APIC_LVTPC vector when HVM guest writes to it.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
xen/arch/x86/hvm/svm/vpmu.c | 4 ----
xen/arch/x86/hvm/vlapic.c | 5 ++++-
xen/arch/x86/hvm/vmx/vpmu_core2.c | 17 -----------------
xen/arch/x86/hvm/vpmu.c | 14 +++++++++++---
xen/include/asm-x86/hvm/vpmu.h | 1 +
5 files changed, 16 insertions(+), 25 deletions(-)
diff --git a/xen/arch/x86/hvm/svm/vpmu.c b/xen/arch/x86/hvm/svm/vpmu.c
index 3666915..2fbe2c1 100644
--- a/xen/arch/x86/hvm/svm/vpmu.c
+++ b/xen/arch/x86/hvm/svm/vpmu.c
@@ -298,8 +298,6 @@ static int amd_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
if ( !acquire_pmu_ownership(PMU_OWNER_HVM) )
return 1;
vpmu_set(vpmu, VPMU_RUNNING);
- apic_write(APIC_LVTPC, PMU_APIC_VECTOR);
- vpmu->hw_lapic_lvtpc = PMU_APIC_VECTOR;
if ( is_hvm_domain(v->domain) &&
!((struct amd_vpmu_context *)vpmu->context)->msr_bitmap_set )
@@ -310,8 +308,6 @@ static int amd_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
if ( (get_pmu_reg_type(msr) == MSR_TYPE_CTRL) &&
(is_pmu_enabled(msr_content) == 0) && vpmu_is_set(vpmu, VPMU_RUNNING) )
{
- apic_write(APIC_LVTPC, PMU_APIC_VECTOR | APIC_LVT_MASKED);
- vpmu->hw_lapic_lvtpc = PMU_APIC_VECTOR | APIC_LVT_MASKED;
vpmu_reset(vpmu, VPMU_RUNNING);
if ( is_hvm_domain(v->domain) &&
((struct amd_vpmu_context *)vpmu->context)->msr_bitmap_set )
diff --git a/xen/arch/x86/hvm/vlapic.c b/xen/arch/x86/hvm/vlapic.c
index bc06010..d954f4f 100644
--- a/xen/arch/x86/hvm/vlapic.c
+++ b/xen/arch/x86/hvm/vlapic.c
@@ -38,6 +38,7 @@
#include <asm/hvm/support.h>
#include <asm/hvm/vmx/vmx.h>
#include <asm/hvm/nestedhvm.h>
+#include <asm/hvm/vpmu.h>
#include <public/hvm/ioreq.h>
#include <public/hvm/params.h>
@@ -732,8 +733,10 @@ static int vlapic_reg_write(struct vcpu *v,
vlapic_adjust_i8259_target(v->domain);
pt_may_unmask_irq(v->domain, NULL);
}
- if ( (offset == APIC_LVTT) && !(val & APIC_LVT_MASKED) )
+ else if ( (offset == APIC_LVTT) && !(val & APIC_LVT_MASKED) )
pt_may_unmask_irq(NULL, &vlapic->pt);
+ else if ( offset == APIC_LVTPC )
+ vpmu_lvtpc_update(val);
break;
case APIC_TMICT:
diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c b/xen/arch/x86/hvm/vmx/vpmu_core2.c
index 513eca4..c16ae10 100644
--- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
+++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
@@ -534,19 +534,6 @@ static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
else
vpmu_reset(vpmu, VPMU_RUNNING);
- /* Setup LVTPC in local apic */
- if ( vpmu_is_set(vpmu, VPMU_RUNNING) &&
- is_vlapic_lvtpc_enabled(vcpu_vlapic(v)) )
- {
- apic_write_around(APIC_LVTPC, PMU_APIC_VECTOR);
- vpmu->hw_lapic_lvtpc = PMU_APIC_VECTOR;
- }
- else
- {
- apic_write_around(APIC_LVTPC, PMU_APIC_VECTOR | APIC_LVT_MASKED);
- vpmu->hw_lapic_lvtpc = PMU_APIC_VECTOR | APIC_LVT_MASKED;
- }
-
if ( type != MSR_TYPE_GLOBAL )
{
u64 mask;
@@ -712,10 +699,6 @@ static int core2_vpmu_do_interrupt(struct cpu_user_regs *regs)
return 0;
}
- /* HW sets the MASK bit when performance counter interrupt occurs*/
- vpmu->hw_lapic_lvtpc = apic_read(APIC_LVTPC) & ~APIC_LVT_MASKED;
- apic_write_around(APIC_LVTPC, vpmu->hw_lapic_lvtpc);
-
return 1;
}
diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
index a48dae2..979bd33 100644
--- a/xen/arch/x86/hvm/vpmu.c
+++ b/xen/arch/x86/hvm/vpmu.c
@@ -64,6 +64,14 @@ static void __init parse_vpmu_param(char *s)
}
}
+void vpmu_lvtpc_update(uint32_t val)
+{
+ struct vpmu_struct *vpmu = vcpu_vpmu(current);
+
+ vpmu->hw_lapic_lvtpc = PMU_APIC_VECTOR | (val & APIC_LVT_MASKED);
+ apic_write(APIC_LVTPC, vpmu->hw_lapic_lvtpc);
+}
+
int vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
{
struct vpmu_struct *vpmu = vcpu_vpmu(current);
@@ -230,18 +238,18 @@ void vpmu_initialise(struct vcpu *v)
case X86_VENDOR_AMD:
if ( svm_vpmu_initialise(v, opt_vpmu_enabled) != 0 )
opt_vpmu_enabled = 0;
- break;
+ return;
case X86_VENDOR_INTEL:
if ( vmx_vpmu_initialise(v, opt_vpmu_enabled) != 0 )
opt_vpmu_enabled = 0;
- break;
+ return;
default:
printk("VPMU: Initialization failed. "
"Unknown CPU vendor %d\n", vendor);
opt_vpmu_enabled = 0;
- break;
+ return;
}
}
diff --git a/xen/include/asm-x86/hvm/vpmu.h b/xen/include/asm-x86/hvm/vpmu.h
index 2a713be..7ee0f01 100644
--- a/xen/include/asm-x86/hvm/vpmu.h
+++ b/xen/include/asm-x86/hvm/vpmu.h
@@ -87,6 +87,7 @@ struct vpmu_struct {
#define vpmu_is_set_all(_vpmu, _x) (((_vpmu)->flags & (_x)) == (_x))
#define vpmu_clear(_vpmu) ((_vpmu)->flags = 0)
+void vpmu_lvtpc_update(uint32_t val);
int vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content);
int vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content);
int vpmu_do_interrupt(struct cpu_user_regs *regs);
--
1.8.3.1
^ permalink raw reply related [flat|nested] 44+ messages in thread
* [PATCH v5 RESEND 06/17] intel/VPMU: MSR_CORE_PERF_GLOBAL_CTRL should be initialized to zero
2014-04-23 12:50 [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Boris Ostrovsky
` (4 preceding siblings ...)
2014-04-23 12:50 ` [PATCH v5 RESEND 05/17] x86/VPMU: Handle APIC_LVTPC accesses Boris Ostrovsky
@ 2014-04-23 12:50 ` Boris Ostrovsky
2014-04-26 8:20 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 07/17] x86/VPMU: Add public xenpmu.h Boris Ostrovsky
` (12 subsequent siblings)
18 siblings, 1 reply; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-23 12:50 UTC (permalink / raw)
To: kevin.tian
Cc: keir, jun.nakajima, andrew.cooper3, eddie.dong, donald.d.dugger,
xen-devel, dietmar.hahn, JBeulich, boris.ostrovsky,
suravee.suthikulpanit
MSR_CORE_PERF_GLOBAL_CTRL register should be set zero initially. It is up to
the guest to set it so that counters are enabled.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
xen/arch/x86/hvm/vmx/vpmu_core2.c | 10 +---------
1 file changed, 1 insertion(+), 9 deletions(-)
diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c b/xen/arch/x86/hvm/vmx/vpmu_core2.c
index c16ae10..c66289a 100644
--- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
+++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
@@ -164,13 +164,6 @@ static int core2_get_fixed_pmc_count(void)
return ( (eax & PMU_FIXED_NR_MASK) >> PMU_FIXED_NR_SHIFT );
}
-static u64 core2_calc_intial_glb_ctrl_msr(void)
-{
- int arch_pmc_bits = (1 << arch_pmc_cnt) - 1;
- u64 fix_pmc_bits = (1 << fixed_pmc_cnt) - 1;
- return ( (fix_pmc_bits << 32) | arch_pmc_bits );
-}
-
/* edx bits 5-12: Bit width of fixed-function performance counters */
static int core2_get_bitwidth_fix_count(void)
{
@@ -373,8 +366,7 @@ static int core2_vpmu_alloc_resource(struct vcpu *v)
if ( vmx_add_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL) )
goto out_err;
- vmx_write_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL,
- core2_calc_intial_glb_ctrl_msr());
+ vmx_write_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, 0);
core2_vpmu_cxt = xzalloc_bytes(sizeof(struct core2_vpmu_context) +
(arch_pmc_cnt-1)*sizeof(struct arch_msr_pair));
--
1.8.3.1
^ permalink raw reply related [flat|nested] 44+ messages in thread
* [PATCH v5 RESEND 07/17] x86/VPMU: Add public xenpmu.h
2014-04-23 12:50 [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Boris Ostrovsky
` (5 preceding siblings ...)
2014-04-23 12:50 ` [PATCH v5 RESEND 06/17] intel/VPMU: MSR_CORE_PERF_GLOBAL_CTRL should be initialized to zero Boris Ostrovsky
@ 2014-04-23 12:50 ` Boris Ostrovsky
2014-04-26 8:21 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 08/17] x86/VPMU: Make vpmu not HVM-specific Boris Ostrovsky
` (11 subsequent siblings)
18 siblings, 1 reply; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-23 12:50 UTC (permalink / raw)
To: kevin.tian
Cc: keir, jun.nakajima, andrew.cooper3, eddie.dong, donald.d.dugger,
xen-devel, dietmar.hahn, JBeulich, boris.ostrovsky,
suravee.suthikulpanit
Add pmu.h header files, move various macros and structures that will be
shared between hypervisor and PV guests to it.
Move MSR banks out of architectural PMU structures to allow for larger sizes
in the future. The banks are allocated immediately after the context and
PMU structures store offsets to them.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
xen/arch/x86/hvm/svm/vpmu.c | 71 ++++++++++++++------------
xen/arch/x86/hvm/vmx/vpmu_core2.c | 87 +++++++++++++++++---------------
xen/arch/x86/hvm/vpmu.c | 1 +
xen/arch/x86/oprofile/op_model_ppro.c | 6 ++-
xen/include/asm-x86/hvm/vmx/vpmu_core2.h | 32 ------------
xen/include/asm-x86/hvm/vpmu.h | 13 ++---
xen/include/public/arch-arm.h | 3 ++
xen/include/public/arch-x86/pmu.h | 63 +++++++++++++++++++++++
xen/include/public/pmu.h | 38 ++++++++++++++
9 files changed, 199 insertions(+), 115 deletions(-)
delete mode 100644 xen/include/asm-x86/hvm/vmx/vpmu_core2.h
create mode 100644 xen/include/public/arch-x86/pmu.h
create mode 100644 xen/include/public/pmu.h
diff --git a/xen/arch/x86/hvm/svm/vpmu.c b/xen/arch/x86/hvm/svm/vpmu.c
index 2fbe2c1..d199f08 100644
--- a/xen/arch/x86/hvm/svm/vpmu.c
+++ b/xen/arch/x86/hvm/svm/vpmu.c
@@ -30,10 +30,7 @@
#include <asm/apic.h>
#include <asm/hvm/vlapic.h>
#include <asm/hvm/vpmu.h>
-
-#define F10H_NUM_COUNTERS 4
-#define F15H_NUM_COUNTERS 6
-#define MAX_NUM_COUNTERS F15H_NUM_COUNTERS
+#include <public/pmu.h>
#define MSR_F10H_EVNTSEL_GO_SHIFT 40
#define MSR_F10H_EVNTSEL_EN_SHIFT 22
@@ -49,6 +46,10 @@ static const u32 __read_mostly *counters;
static const u32 __read_mostly *ctrls;
static bool_t __read_mostly k7_counters_mirrored;
+#define F10H_NUM_COUNTERS 4
+#define F15H_NUM_COUNTERS 6
+#define AMD_MAX_COUNTERS 6
+
/* PMU Counter MSRs. */
static const u32 AMD_F10H_COUNTERS[] = {
MSR_K7_PERFCTR0,
@@ -83,13 +84,6 @@ static const u32 AMD_F15H_CTRLS[] = {
MSR_AMD_FAM15H_EVNTSEL5
};
-/* storage for context switching */
-struct amd_vpmu_context {
- u64 counters[MAX_NUM_COUNTERS];
- u64 ctrls[MAX_NUM_COUNTERS];
- bool_t msr_bitmap_set;
-};
-
static inline int get_pmu_reg_type(u32 addr)
{
if ( (addr >= MSR_K7_EVNTSEL0) && (addr <= MSR_K7_EVNTSEL3) )
@@ -142,7 +136,7 @@ static void amd_vpmu_set_msr_bitmap(struct vcpu *v)
{
unsigned int i;
struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct amd_vpmu_context *ctxt = vpmu->context;
+ struct xen_pmu_amd_ctxt *ctxt = vpmu->context;
for ( i = 0; i < num_counters; i++ )
{
@@ -157,7 +151,7 @@ static void amd_vpmu_unset_msr_bitmap(struct vcpu *v)
{
unsigned int i;
struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct amd_vpmu_context *ctxt = vpmu->context;
+ struct xen_pmu_amd_ctxt *ctxt = vpmu->context;
for ( i = 0; i < num_counters; i++ )
{
@@ -177,19 +171,22 @@ static inline void context_load(struct vcpu *v)
{
unsigned int i;
struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct amd_vpmu_context *ctxt = vpmu->context;
+ struct xen_pmu_amd_ctxt *ctxt = vpmu->context;
+ uint64_t *counter_regs = vpmu_reg_pointer(ctxt, counters);
+ uint64_t *ctrl_regs = vpmu_reg_pointer(ctxt, ctrls);
for ( i = 0; i < num_counters; i++ )
{
- wrmsrl(counters[i], ctxt->counters[i]);
- wrmsrl(ctrls[i], ctxt->ctrls[i]);
+ wrmsrl(counters[i], counter_regs[i]);
+ wrmsrl(ctrls[i], ctrl_regs[i]);
}
}
static void amd_vpmu_load(struct vcpu *v)
{
struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct amd_vpmu_context *ctxt = vpmu->context;
+ struct xen_pmu_amd_ctxt *ctxt = vpmu->context;
+ uint64_t *ctrl_regs = vpmu_reg_pointer(ctxt, ctrls);
vpmu_reset(vpmu, VPMU_FROZEN);
@@ -198,7 +195,7 @@ static void amd_vpmu_load(struct vcpu *v)
unsigned int i;
for ( i = 0; i < num_counters; i++ )
- wrmsrl(ctrls[i], ctxt->ctrls[i]);
+ wrmsrl(ctrls[i], ctrl_regs[i]);
return;
}
@@ -212,17 +209,18 @@ static inline void context_save(struct vcpu *v)
{
unsigned int i;
struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct amd_vpmu_context *ctxt = vpmu->context;
+ struct xen_pmu_amd_ctxt *ctxt = vpmu->context;
+ uint64_t *counter_regs = vpmu_reg_pointer(ctxt, counters);
/* No need to save controls -- they are saved in amd_vpmu_do_wrmsr */
for ( i = 0; i < num_counters; i++ )
- rdmsrl(counters[i], ctxt->counters[i]);
+ rdmsrl(counters[i], counter_regs[i]);
}
static int amd_vpmu_save(struct vcpu *v)
{
struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct amd_vpmu_context *ctx = vpmu->context;
+ struct xen_pmu_amd_ctxt *ctx = vpmu->context;
unsigned int i;
/*
@@ -256,7 +254,9 @@ static void context_update(unsigned int msr, u64 msr_content)
unsigned int i;
struct vcpu *v = current;
struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct amd_vpmu_context *ctxt = vpmu->context;
+ struct xen_pmu_amd_ctxt *ctxt = vpmu->context;
+ uint64_t *counter_regs = vpmu_reg_pointer(ctxt, counters);
+ uint64_t *ctrl_regs = vpmu_reg_pointer(ctxt, ctrls);
if ( k7_counters_mirrored &&
((msr >= MSR_K7_EVNTSEL0) && (msr <= MSR_K7_PERFCTR3)) )
@@ -268,12 +268,12 @@ static void context_update(unsigned int msr, u64 msr_content)
{
if ( msr == ctrls[i] )
{
- ctxt->ctrls[i] = msr_content;
+ ctrl_regs[i] = msr_content;
return;
}
else if (msr == counters[i] )
{
- ctxt->counters[i] = msr_content;
+ counter_regs[i] = msr_content;
return;
}
}
@@ -300,7 +300,7 @@ static int amd_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
vpmu_set(vpmu, VPMU_RUNNING);
if ( is_hvm_domain(v->domain) &&
- !((struct amd_vpmu_context *)vpmu->context)->msr_bitmap_set )
+ !((struct xen_pmu_amd_ctxt *)vpmu->context)->msr_bitmap_set )
amd_vpmu_set_msr_bitmap(v);
}
@@ -310,7 +310,7 @@ static int amd_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
{
vpmu_reset(vpmu, VPMU_RUNNING);
if ( is_hvm_domain(v->domain) &&
- ((struct amd_vpmu_context *)vpmu->context)->msr_bitmap_set )
+ ((struct xen_pmu_amd_ctxt *)vpmu->context)->msr_bitmap_set )
amd_vpmu_unset_msr_bitmap(v);
release_pmu_ownship(PMU_OWNER_HVM);
}
@@ -351,7 +351,7 @@ static int amd_vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content)
static int amd_vpmu_initialise(struct vcpu *v)
{
- struct amd_vpmu_context *ctxt;
+ struct xen_pmu_amd_ctxt *ctxt;
struct vpmu_struct *vpmu = vcpu_vpmu(v);
uint8_t family = current_cpu_data.x86;
@@ -381,7 +381,9 @@ static int amd_vpmu_initialise(struct vcpu *v)
}
}
- ctxt = xzalloc(struct amd_vpmu_context);
+ ctxt = xzalloc_bytes(sizeof(struct xen_pmu_amd_ctxt) +
+ sizeof(uint64_t) * AMD_MAX_COUNTERS +
+ sizeof(uint64_t) * AMD_MAX_COUNTERS);
if ( !ctxt )
{
gdprintk(XENLOG_WARNING, "Insufficient memory for PMU, "
@@ -390,6 +392,9 @@ static int amd_vpmu_initialise(struct vcpu *v)
return -ENOMEM;
}
+ ctxt->counters = sizeof(struct xen_pmu_amd_ctxt);
+ ctxt->ctrls = ctxt->counters + sizeof(uint64_t) * AMD_MAX_COUNTERS;
+
vpmu->context = ctxt;
vpmu_set(vpmu, VPMU_CONTEXT_ALLOCATED);
return 0;
@@ -403,7 +408,7 @@ static void amd_vpmu_destroy(struct vcpu *v)
return;
if ( is_hvm_domain(v->domain) &&
- ((struct amd_vpmu_context *)vpmu->context)->msr_bitmap_set )
+ ((struct xen_pmu_amd_ctxt *)vpmu->context)->msr_bitmap_set )
amd_vpmu_unset_msr_bitmap(v);
xfree(vpmu->context);
@@ -420,7 +425,9 @@ static void amd_vpmu_destroy(struct vcpu *v)
static void amd_vpmu_dump(const struct vcpu *v)
{
const struct vpmu_struct *vpmu = vcpu_vpmu(v);
- const struct amd_vpmu_context *ctxt = vpmu->context;
+ const struct xen_pmu_amd_ctxt *ctxt = vpmu->context;
+ uint64_t *counter_regs = vpmu_reg_pointer(ctxt, counters);
+ uint64_t *ctrl_regs = vpmu_reg_pointer(ctxt, ctrls);
unsigned int i;
printk(" VPMU state: 0x%x ", vpmu->flags);
@@ -450,8 +457,8 @@ static void amd_vpmu_dump(const struct vcpu *v)
rdmsrl(ctrls[i], ctrl);
rdmsrl(counters[i], cntr);
printk(" %#x: %#lx (%#lx in HW) %#x: %#lx (%#lx in HW)\n",
- ctrls[i], ctxt->ctrls[i], ctrl,
- counters[i], ctxt->counters[i], cntr);
+ ctrls[i], ctrl_regs[i], ctrl,
+ counters[i], counter_regs[i], cntr);
}
}
diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c b/xen/arch/x86/hvm/vmx/vpmu_core2.c
index c66289a..856281d 100644
--- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
+++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
@@ -35,8 +35,8 @@
#include <asm/hvm/vmx/vmcs.h>
#include <public/sched.h>
#include <public/hvm/save.h>
+#include <public/pmu.h>
#include <asm/hvm/vpmu.h>
-#include <asm/hvm/vmx/vpmu_core2.h>
/*
* See Intel SDM Vol 2a Instruction Set Reference chapter 3 for CPUID
@@ -68,6 +68,10 @@
#define MSR_PMC_ALIAS_MASK (~(MSR_IA32_PERFCTR0 ^ MSR_IA32_A_PERFCTR0))
static bool_t __read_mostly full_width_write;
+/* Intel-specific VPMU features */
+#define VPMU_CPU_HAS_DS 0x100 /* Has Debug Store */
+#define VPMU_CPU_HAS_BTS 0x200 /* Has Branch Trace Store */
+
/*
* MSR_CORE_PERF_FIXED_CTR_CTRL contains the configuration of all fixed
* counters. 4 bits for every counter.
@@ -75,16 +79,6 @@ static bool_t __read_mostly full_width_write;
#define FIXED_CTR_CTRL_BITS 4
#define FIXED_CTR_CTRL_MASK ((1 << FIXED_CTR_CTRL_BITS) - 1)
-#define VPMU_CORE2_MAX_FIXED_PMCS 4
-struct core2_vpmu_context {
- u64 fixed_ctrl;
- u64 ds_area;
- u64 pebs_enable;
- u64 global_ovf_status;
- u64 fix_counters[VPMU_CORE2_MAX_FIXED_PMCS];
- struct arch_msr_pair arch_msr_pair[1];
-};
-
/* Number of general-purpose and fixed performance counters */
static unsigned int __read_mostly arch_pmc_cnt, fixed_pmc_cnt;
@@ -224,6 +218,7 @@ static int is_core2_vpmu_msr(u32 msr_index, int *type, int *index)
return 0;
}
+#define msraddr_to_bitpos(x) (((x)&0xffff) + ((x)>>31)*0x2000)
static void core2_vpmu_set_msr_bitmap(unsigned long *msr_bitmap)
{
int i;
@@ -293,12 +288,15 @@ static void core2_vpmu_unset_msr_bitmap(unsigned long *msr_bitmap)
static inline void __core2_vpmu_save(struct vcpu *v)
{
int i;
- struct core2_vpmu_context *core2_vpmu_cxt = vcpu_vpmu(v)->context;
+ struct xen_pmu_intel_ctxt *core2_vpmu_cxt = vcpu_vpmu(v)->context;
+ uint64_t *fixed_counters = vpmu_reg_pointer(core2_vpmu_cxt, fixed_counters);
+ struct xen_pmu_cntr_pair *xen_pmu_cntr_pair =
+ vpmu_reg_pointer(core2_vpmu_cxt, arch_counters);
for ( i = 0; i < fixed_pmc_cnt; i++ )
- rdmsrl(MSR_CORE_PERF_FIXED_CTR0 + i, core2_vpmu_cxt->fix_counters[i]);
+ rdmsrl(MSR_CORE_PERF_FIXED_CTR0 + i, fixed_counters[i]);
for ( i = 0; i < arch_pmc_cnt; i++ )
- rdmsrl(MSR_IA32_PERFCTR0 + i, core2_vpmu_cxt->arch_msr_pair[i].counter);
+ rdmsrl(MSR_IA32_PERFCTR0 + i, xen_pmu_cntr_pair[i].counter);
}
static int core2_vpmu_save(struct vcpu *v)
@@ -320,10 +318,13 @@ static int core2_vpmu_save(struct vcpu *v)
static inline void __core2_vpmu_load(struct vcpu *v)
{
unsigned int i, pmc_start;
- struct core2_vpmu_context *core2_vpmu_cxt = vcpu_vpmu(v)->context;
+ struct xen_pmu_intel_ctxt *core2_vpmu_cxt = vcpu_vpmu(v)->context;
+ uint64_t *fixed_counters = vpmu_reg_pointer(core2_vpmu_cxt, fixed_counters);
+ struct xen_pmu_cntr_pair *xen_pmu_cntr_pair =
+ vpmu_reg_pointer(core2_vpmu_cxt, arch_counters);
for ( i = 0; i < fixed_pmc_cnt; i++ )
- wrmsrl(MSR_CORE_PERF_FIXED_CTR0 + i, core2_vpmu_cxt->fix_counters[i]);
+ wrmsrl(MSR_CORE_PERF_FIXED_CTR0 + i, fixed_counters[i]);
if ( full_width_write )
pmc_start = MSR_IA32_A_PERFCTR0;
@@ -331,8 +332,8 @@ static inline void __core2_vpmu_load(struct vcpu *v)
pmc_start = MSR_IA32_PERFCTR0;
for ( i = 0; i < arch_pmc_cnt; i++ )
{
- wrmsrl(pmc_start + i, core2_vpmu_cxt->arch_msr_pair[i].counter);
- wrmsrl(MSR_P6_EVNTSEL0 + i, core2_vpmu_cxt->arch_msr_pair[i].control);
+ wrmsrl(pmc_start + i, xen_pmu_cntr_pair[i].counter);
+ wrmsrl(MSR_P6_EVNTSEL0 + i, xen_pmu_cntr_pair[i].control);
}
wrmsrl(MSR_CORE_PERF_FIXED_CTR_CTRL, core2_vpmu_cxt->fixed_ctrl);
@@ -355,7 +356,7 @@ static void core2_vpmu_load(struct vcpu *v)
static int core2_vpmu_alloc_resource(struct vcpu *v)
{
struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct core2_vpmu_context *core2_vpmu_cxt;
+ struct xen_pmu_intel_ctxt *core2_vpmu_cxt;
if ( !acquire_pmu_ownership(PMU_OWNER_HVM) )
return 0;
@@ -368,11 +369,16 @@ static int core2_vpmu_alloc_resource(struct vcpu *v)
goto out_err;
vmx_write_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, 0);
- core2_vpmu_cxt = xzalloc_bytes(sizeof(struct core2_vpmu_context) +
- (arch_pmc_cnt-1)*sizeof(struct arch_msr_pair));
+ core2_vpmu_cxt = xzalloc_bytes(sizeof(struct xen_pmu_intel_ctxt) +
+ sizeof(uint64_t) * fixed_pmc_cnt +
+ sizeof(struct xen_pmu_cntr_pair) * arch_pmc_cnt);
if ( !core2_vpmu_cxt )
goto out_err;
+ core2_vpmu_cxt->fixed_counters = sizeof(struct xen_pmu_intel_ctxt);
+ core2_vpmu_cxt->arch_counters = core2_vpmu_cxt->fixed_counters +
+ sizeof(uint64_t) * fixed_pmc_cnt;
+
vpmu->context = (void *)core2_vpmu_cxt;
vpmu_set(vpmu, VPMU_CONTEXT_ALLOCATED);
@@ -420,7 +426,7 @@ static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
int type = -1, index = -1;
struct vcpu *v = current;
struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct core2_vpmu_context *core2_vpmu_cxt = NULL;
+ struct xen_pmu_intel_ctxt *core2_vpmu_cxt = NULL;
if ( !core2_vpmu_msr_common_check(msr, &type, &index) )
{
@@ -449,7 +455,7 @@ static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
switch ( msr )
{
case MSR_CORE_PERF_GLOBAL_OVF_CTRL:
- core2_vpmu_cxt->global_ovf_status &= ~msr_content;
+ core2_vpmu_cxt->global_status &= ~msr_content;
return 1;
case MSR_CORE_PERF_GLOBAL_STATUS:
gdprintk(XENLOG_INFO, "Can not write readonly MSR: "
@@ -512,11 +518,14 @@ static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
tmp = msr - MSR_P6_EVNTSEL0;
if ( tmp >= 0 && tmp < arch_pmc_cnt )
{
+ struct xen_pmu_cntr_pair *xen_pmu_cntr_pair =
+ vpmu_reg_pointer(core2_vpmu_cxt, arch_counters);
+
vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, &global_ctrl);
- core2_vpmu_cxt->arch_msr_pair[tmp].control = msr_content;
+ xen_pmu_cntr_pair[tmp].control = msr_content;
for ( i = 0; i < arch_pmc_cnt && !pmu_enable; i++ )
pmu_enable += (global_ctrl >> i) &
- (core2_vpmu_cxt->arch_msr_pair[i].control >> 22) & 1;
+ (xen_pmu_cntr_pair[i].control >> 22) & 1;
}
}
@@ -567,7 +576,7 @@ static int core2_vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content)
int type = -1, index = -1;
struct vcpu *v = current;
struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct core2_vpmu_context *core2_vpmu_cxt = NULL;
+ struct xen_pmu_intel_ctxt *core2_vpmu_cxt = NULL;
if ( core2_vpmu_msr_common_check(msr, &type, &index) )
{
@@ -578,7 +587,7 @@ static int core2_vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content)
*msr_content = 0;
break;
case MSR_CORE_PERF_GLOBAL_STATUS:
- *msr_content = core2_vpmu_cxt->global_ovf_status;
+ *msr_content = core2_vpmu_cxt->global_status;
break;
case MSR_CORE_PERF_GLOBAL_CTRL:
vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, msr_content);
@@ -627,8 +636,11 @@ static void core2_vpmu_dump(const struct vcpu *v)
{
const struct vpmu_struct *vpmu = vcpu_vpmu(v);
int i;
- const struct core2_vpmu_context *core2_vpmu_cxt = NULL;
+ const struct xen_pmu_intel_ctxt *core2_vpmu_cxt = NULL;
u64 val;
+ uint64_t *fixed_counters = vpmu_reg_pointer(core2_vpmu_cxt, fixed_counters);
+ struct xen_pmu_cntr_pair *xen_pmu_cntr_pair =
+ vpmu_reg_pointer(core2_vpmu_cxt, arch_counters);
if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
return;
@@ -647,12 +659,9 @@ static void core2_vpmu_dump(const struct vcpu *v)
/* Print the contents of the counter and its configuration msr. */
for ( i = 0; i < arch_pmc_cnt; i++ )
- {
- const struct arch_msr_pair *msr_pair = core2_vpmu_cxt->arch_msr_pair;
-
printk(" general_%d: 0x%016lx ctrl: 0x%016lx\n",
- i, msr_pair[i].counter, msr_pair[i].control);
- }
+ i, xen_pmu_cntr_pair[i].counter, xen_pmu_cntr_pair[i].control);
+
/*
* The configuration of the fixed counter is 4 bits each in the
* MSR_CORE_PERF_FIXED_CTR_CTRL.
@@ -661,7 +670,7 @@ static void core2_vpmu_dump(const struct vcpu *v)
for ( i = 0; i < fixed_pmc_cnt; i++ )
{
printk(" fixed_%d: 0x%016lx ctrl: %#lx\n",
- i, core2_vpmu_cxt->fix_counters[i],
+ i, fixed_counters[i],
val & FIXED_CTR_CTRL_MASK);
val >>= FIXED_CTR_CTRL_BITS;
}
@@ -672,14 +681,14 @@ static int core2_vpmu_do_interrupt(struct cpu_user_regs *regs)
struct vcpu *v = current;
u64 msr_content;
struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct core2_vpmu_context *core2_vpmu_cxt = vpmu->context;
+ struct xen_pmu_intel_ctxt *core2_vpmu_cxt = vpmu->context;
rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS, msr_content);
if ( msr_content )
{
if ( is_pmc_quirk )
handle_pmc_quirk(msr_content);
- core2_vpmu_cxt->global_ovf_status |= msr_content;
+ core2_vpmu_cxt->global_status |= msr_content;
msr_content = 0xC000000700000000 | ((1 << arch_pmc_cnt) - 1);
wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, msr_content);
}
@@ -742,12 +751,6 @@ func_out:
arch_pmc_cnt = core2_get_arch_pmc_count();
fixed_pmc_cnt = core2_get_fixed_pmc_count();
- if ( fixed_pmc_cnt > VPMU_CORE2_MAX_FIXED_PMCS )
- {
- fixed_pmc_cnt = VPMU_CORE2_MAX_FIXED_PMCS;
- printk(XENLOG_G_WARNING "Limiting number of fixed counters to %d\n",
- fixed_pmc_cnt);
- }
check_pmc_quirk();
return 0;
diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
index 979bd33..a6e933a 100644
--- a/xen/arch/x86/hvm/vpmu.c
+++ b/xen/arch/x86/hvm/vpmu.c
@@ -31,6 +31,7 @@
#include <asm/hvm/svm/svm.h>
#include <asm/hvm/svm/vmcb.h>
#include <asm/apic.h>
+#include <public/pmu.h>
/*
* "vpmu" : vpmu generally enabled
diff --git a/xen/arch/x86/oprofile/op_model_ppro.c b/xen/arch/x86/oprofile/op_model_ppro.c
index 3225937..5aae2e7 100644
--- a/xen/arch/x86/oprofile/op_model_ppro.c
+++ b/xen/arch/x86/oprofile/op_model_ppro.c
@@ -20,11 +20,15 @@
#include <asm/regs.h>
#include <asm/current.h>
#include <asm/hvm/vpmu.h>
-#include <asm/hvm/vmx/vpmu_core2.h>
#include "op_x86_model.h"
#include "op_counter.h"
+struct arch_msr_pair {
+ u64 counter;
+ u64 control;
+};
+
/*
* Intel "Architectural Performance Monitoring" CPUID
* detection/enumeration details:
diff --git a/xen/include/asm-x86/hvm/vmx/vpmu_core2.h b/xen/include/asm-x86/hvm/vmx/vpmu_core2.h
deleted file mode 100644
index 410372d..0000000
--- a/xen/include/asm-x86/hvm/vmx/vpmu_core2.h
+++ /dev/null
@@ -1,32 +0,0 @@
-
-/*
- * vpmu_core2.h: CORE 2 specific PMU virtualization for HVM domain.
- *
- * Copyright (c) 2007, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307 USA.
- *
- * Author: Haitao Shan <haitao.shan@intel.com>
- */
-
-#ifndef __ASM_X86_HVM_VPMU_CORE_H_
-#define __ASM_X86_HVM_VPMU_CORE_H_
-
-struct arch_msr_pair {
- u64 counter;
- u64 control;
-};
-
-#endif /* __ASM_X86_HVM_VPMU_CORE_H_ */
-
diff --git a/xen/include/asm-x86/hvm/vpmu.h b/xen/include/asm-x86/hvm/vpmu.h
index 7ee0f01..87a72ce 100644
--- a/xen/include/asm-x86/hvm/vpmu.h
+++ b/xen/include/asm-x86/hvm/vpmu.h
@@ -22,6 +22,8 @@
#ifndef __ASM_X86_HVM_VPMU_H_
#define __ASM_X86_HVM_VPMU_H_
+#include <public/pmu.h>
+
/*
* Flag bits given as a string on the hypervisor boot parameter 'vpmu'.
* See arch/x86/hvm/vpmu.c.
@@ -29,12 +31,9 @@
#define VPMU_BOOT_ENABLED 0x1 /* vpmu generally enabled. */
#define VPMU_BOOT_BTS 0x2 /* Intel BTS feature wanted. */
-
-#define msraddr_to_bitpos(x) (((x)&0xffff) + ((x)>>31)*0x2000)
#define vcpu_vpmu(vcpu) (&((vcpu)->arch.hvm_vcpu.vpmu))
#define vpmu_vcpu(vpmu) (container_of((vpmu), struct vcpu, \
arch.hvm_vcpu.vpmu))
-#define vpmu_domain(vpmu) (vpmu_vcpu(vpmu)->domain)
#define MSR_TYPE_COUNTER 0
#define MSR_TYPE_CTRL 1
@@ -42,6 +41,9 @@
#define MSR_TYPE_ARCH_COUNTER 3
#define MSR_TYPE_ARCH_CTRL 4
+/* Start of PMU register bank */
+#define vpmu_reg_pointer(ctxt, offset) ((void *)((uintptr_t)ctxt + \
+ (uintptr_t)ctxt->offset))
/* Arch specific operations shared by all vpmus */
struct arch_vpmu_ops {
@@ -76,11 +78,6 @@ struct vpmu_struct {
#define VPMU_FROZEN 0x10 /* Stop counters while VCPU is not running */
#define VPMU_PASSIVE_DOMAIN_ALLOCATED 0x20
-/* VPMU features */
-#define VPMU_CPU_HAS_DS 0x100 /* Has Debug Store */
-#define VPMU_CPU_HAS_BTS 0x200 /* Has Branch Trace Store */
-
-
#define vpmu_set(_vpmu, _x) ((_vpmu)->flags |= (_x))
#define vpmu_reset(_vpmu, _x) ((_vpmu)->flags &= ~(_x))
#define vpmu_is_set(_vpmu, _x) ((_vpmu)->flags & (_x))
diff --git a/xen/include/public/arch-arm.h b/xen/include/public/arch-arm.h
index 7496556..e982b53 100644
--- a/xen/include/public/arch-arm.h
+++ b/xen/include/public/arch-arm.h
@@ -388,6 +388,9 @@ typedef uint64_t xen_callback_t;
#endif
+/* Stub definition of PMU structure */
+typedef struct xen_arch_pmu {} xen_arch_pmu_t;
+
#endif /* __XEN_PUBLIC_ARCH_ARM_H__ */
/*
diff --git a/xen/include/public/arch-x86/pmu.h b/xen/include/public/arch-x86/pmu.h
new file mode 100644
index 0000000..fc022e2
--- /dev/null
+++ b/xen/include/public/arch-x86/pmu.h
@@ -0,0 +1,63 @@
+#ifndef __XEN_PUBLIC_ARCH_X86_PMU_H__
+#define __XEN_PUBLIC_ARCH_X86_PMU_H__
+
+/* x86-specific PMU definitions */
+
+/* AMD PMU registers and structures */
+struct xen_pmu_amd_ctxt {
+ uint32_t counters; /* Offset to counter MSRs */
+ uint32_t ctrls; /* Offset to control MSRs */
+ uint32_t msr_bitmap_set; /* Used by HVM only */
+};
+
+/* Intel PMU registers and structures */
+struct xen_pmu_cntr_pair {
+ uint64_t counter;
+ uint64_t control;
+};
+
+struct xen_pmu_intel_ctxt {
+ uint64_t global_ctrl;
+ uint64_t global_ovf_ctrl;
+ uint64_t global_status;
+ uint64_t fixed_ctrl;
+ uint64_t ds_area;
+ uint64_t pebs_enable;
+ uint64_t debugctl;
+ uint32_t fixed_counters; /* Offset to fixed counter MSRs */
+ uint32_t arch_counters; /* Offset to architectural counter MSRs */
+};
+
+#define XENPMU_MAX_CTXT_SZ (sizeof(struct xen_pmu_amd_ctxt) > \
+ sizeof(struct xen_pmu_intel_ctxt) ? \
+ sizeof(struct xen_pmu_amd_ctxt) : \
+ sizeof(struct xen_pmu_intel_ctxt))
+#define XENPMU_CTXT_PAD_SZ (((XENPMU_MAX_CTXT_SZ + 64) & ~63) + 128)
+struct xen_arch_pmu {
+ union {
+ struct cpu_user_regs regs;
+ uint8_t pad1[256];
+ } r;
+ union {
+ uint32_t lapic_lvtpc;
+ uint64_t pad2;
+ } l;
+ union {
+ struct xen_pmu_amd_ctxt amd;
+ struct xen_pmu_intel_ctxt intel;
+ uint8_t pad3[XENPMU_CTXT_PAD_SZ];
+ } c;
+};
+typedef struct xen_arch_pmu xen_arch_pmu_t;
+
+#endif /* __XEN_PUBLIC_ARCH_X86_PMU_H__ */
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
+
diff --git a/xen/include/public/pmu.h b/xen/include/public/pmu.h
new file mode 100644
index 0000000..3ffd2cf
--- /dev/null
+++ b/xen/include/public/pmu.h
@@ -0,0 +1,38 @@
+#ifndef __XEN_PUBLIC_PMU_H__
+#define __XEN_PUBLIC_PMU_H__
+
+#include "xen.h"
+#if defined(__i386__) || defined(__x86_64__)
+#include "arch-x86/pmu.h"
+#elif defined (__arm__) || defined (__aarch64__)
+#include "arch-arm.h"
+#else
+#error "Unsupported architecture"
+#endif
+
+#define XENPMU_VER_MAJ 0
+#define XENPMU_VER_MIN 0
+
+
+/* Shared between hypervisor and PV domain */
+struct xen_pmu_data {
+ uint32_t domain_id;
+ uint32_t vcpu_id;
+ uint32_t pcpu_id;
+ uint32_t pmu_flags;
+
+ xen_arch_pmu_t pmu;
+};
+typedef struct xen_pmu_data xen_pmu_data_t;
+
+#endif /* __XEN_PUBLIC_PMU_H__ */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
--
1.8.3.1
^ permalink raw reply related [flat|nested] 44+ messages in thread
* [PATCH v5 RESEND 08/17] x86/VPMU: Make vpmu not HVM-specific
2014-04-23 12:50 [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Boris Ostrovsky
` (6 preceding siblings ...)
2014-04-23 12:50 ` [PATCH v5 RESEND 07/17] x86/VPMU: Add public xenpmu.h Boris Ostrovsky
@ 2014-04-23 12:50 ` Boris Ostrovsky
2014-04-26 8:21 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 09/17] x86/VPMU: Interface for setting PMU mode and flags Boris Ostrovsky
` (10 subsequent siblings)
18 siblings, 1 reply; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-23 12:50 UTC (permalink / raw)
To: kevin.tian
Cc: keir, jun.nakajima, andrew.cooper3, eddie.dong, donald.d.dugger,
xen-devel, dietmar.hahn, JBeulich, boris.ostrovsky,
suravee.suthikulpanit
vpmu structure will be used for both HVM and PV guests. Move it from
hvm_vcpu to arch_vcpu.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
xen/include/asm-x86/domain.h | 2 ++
xen/include/asm-x86/hvm/vcpu.h | 3 ---
xen/include/asm-x86/hvm/vpmu.h | 5 ++---
3 files changed, 4 insertions(+), 6 deletions(-)
diff --git a/xen/include/asm-x86/domain.h b/xen/include/asm-x86/domain.h
index ea72db2..f38298c 100644
--- a/xen/include/asm-x86/domain.h
+++ b/xen/include/asm-x86/domain.h
@@ -400,6 +400,8 @@ struct arch_vcpu
void (*ctxt_switch_from) (struct vcpu *);
void (*ctxt_switch_to) (struct vcpu *);
+ struct vpmu_struct vpmu;
+
/* Virtual Machine Extensions */
union {
struct pv_vcpu pv_vcpu;
diff --git a/xen/include/asm-x86/hvm/vcpu.h b/xen/include/asm-x86/hvm/vcpu.h
index 122ab0d..9beeaa9 100644
--- a/xen/include/asm-x86/hvm/vcpu.h
+++ b/xen/include/asm-x86/hvm/vcpu.h
@@ -152,9 +152,6 @@ struct hvm_vcpu {
u32 msr_tsc_aux;
u64 msr_tsc_adjust;
- /* VPMU */
- struct vpmu_struct vpmu;
-
union {
struct arch_vmx_struct vmx;
struct arch_svm_struct svm;
diff --git a/xen/include/asm-x86/hvm/vpmu.h b/xen/include/asm-x86/hvm/vpmu.h
index 87a72ce..edc67f6 100644
--- a/xen/include/asm-x86/hvm/vpmu.h
+++ b/xen/include/asm-x86/hvm/vpmu.h
@@ -31,9 +31,8 @@
#define VPMU_BOOT_ENABLED 0x1 /* vpmu generally enabled. */
#define VPMU_BOOT_BTS 0x2 /* Intel BTS feature wanted. */
-#define vcpu_vpmu(vcpu) (&((vcpu)->arch.hvm_vcpu.vpmu))
-#define vpmu_vcpu(vpmu) (container_of((vpmu), struct vcpu, \
- arch.hvm_vcpu.vpmu))
+#define vcpu_vpmu(vcpu) (&(vcpu)->arch.vpmu)
+#define vpmu_vcpu(vpmu) container_of(vpmu, struct vcpu, arch.vpmu)
#define MSR_TYPE_COUNTER 0
#define MSR_TYPE_CTRL 1
--
1.8.3.1
^ permalink raw reply related [flat|nested] 44+ messages in thread
* [PATCH v5 RESEND 09/17] x86/VPMU: Interface for setting PMU mode and flags
2014-04-23 12:50 [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Boris Ostrovsky
` (7 preceding siblings ...)
2014-04-23 12:50 ` [PATCH v5 RESEND 08/17] x86/VPMU: Make vpmu not HVM-specific Boris Ostrovsky
@ 2014-04-23 12:50 ` Boris Ostrovsky
2014-04-26 8:21 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 10/17] x86/VPMU: Initialize PMU for PV guests Boris Ostrovsky
` (9 subsequent siblings)
18 siblings, 1 reply; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-23 12:50 UTC (permalink / raw)
To: kevin.tian
Cc: keir, jun.nakajima, andrew.cooper3, eddie.dong, donald.d.dugger,
xen-devel, dietmar.hahn, JBeulich, boris.ostrovsky,
suravee.suthikulpanit
Add runtime interface for setting PMU mode and flags. Three main modes are
provided:
* PMU off
* PMU on: Guests can access PMU MSRs and receive PMU interrupts. dom0
profiles itself and the hypervisor.
* dom0-only PMU: dom0 collects samples for both itself and guests.
For feature flags only Intel's BTS is currently supported.
Mode and flags are set via HYPERVISOR_xenpmu_op hypercall.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
xen/arch/x86/domain.c | 4 +-
xen/arch/x86/hvm/svm/vpmu.c | 4 +-
xen/arch/x86/hvm/vmx/vpmu_core2.c | 10 +--
xen/arch/x86/hvm/vpmu.c | 121 ++++++++++++++++++++++++++++++++++---
xen/arch/x86/x86_64/compat/entry.S | 4 ++
xen/arch/x86/x86_64/entry.S | 4 ++
xen/include/asm-x86/hvm/vpmu.h | 14 ++---
xen/include/public/pmu.h | 48 +++++++++++++++
xen/include/public/xen.h | 1 +
xen/include/xen/hypercall.h | 4 ++
10 files changed, 188 insertions(+), 26 deletions(-)
diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c
index 6618ae6..b615c07 100644
--- a/xen/arch/x86/domain.c
+++ b/xen/arch/x86/domain.c
@@ -1465,7 +1465,7 @@ void context_switch(struct vcpu *prev, struct vcpu *next)
if ( is_hvm_vcpu(prev) )
{
- if (prev != next)
+ if ( (prev != next) && (vpmu_mode & XENPMU_MODE_ON) )
vpmu_save(prev);
if ( !list_empty(&prev->arch.hvm_vcpu.tm_list) )
@@ -1508,7 +1508,7 @@ void context_switch(struct vcpu *prev, struct vcpu *next)
(next->domain->domain_id != 0));
}
- if (is_hvm_vcpu(next) && (prev != next) )
+ if ( is_hvm_vcpu(next) && (prev != next) && (vpmu_mode & XENPMU_MODE_ON) )
/* Must be done with interrupts enabled */
vpmu_load(next);
diff --git a/xen/arch/x86/hvm/svm/vpmu.c b/xen/arch/x86/hvm/svm/vpmu.c
index d199f08..97cd6e5 100644
--- a/xen/arch/x86/hvm/svm/vpmu.c
+++ b/xen/arch/x86/hvm/svm/vpmu.c
@@ -472,14 +472,14 @@ struct arch_vpmu_ops amd_vpmu_ops = {
.arch_vpmu_dump = amd_vpmu_dump
};
-int svm_vpmu_initialise(struct vcpu *v, unsigned int vpmu_flags)
+int svm_vpmu_initialise(struct vcpu *v)
{
struct vpmu_struct *vpmu = vcpu_vpmu(v);
uint8_t family = current_cpu_data.x86;
int ret = 0;
/* vpmu enabled? */
- if ( !vpmu_flags )
+ if ( vpmu_mode == XENPMU_MODE_OFF )
return 0;
switch ( family )
diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c b/xen/arch/x86/hvm/vmx/vpmu_core2.c
index 856281d..efbebe2 100644
--- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
+++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
@@ -703,13 +703,13 @@ static int core2_vpmu_do_interrupt(struct cpu_user_regs *regs)
return 1;
}
-static int core2_vpmu_initialise(struct vcpu *v, unsigned int vpmu_flags)
+static int core2_vpmu_initialise(struct vcpu *v)
{
struct vpmu_struct *vpmu = vcpu_vpmu(v);
u64 msr_content;
struct cpuinfo_x86 *c = ¤t_cpu_data;
- if ( !(vpmu_flags & VPMU_BOOT_BTS) )
+ if ( !(vpmu_features & XENPMU_FEATURE_INTEL_BTS) )
goto func_out;
/* Check the 'Debug Store' feature in the CPUID.EAX[1]:EDX[21] */
if ( cpu_has(c, X86_FEATURE_DS) )
@@ -820,7 +820,7 @@ struct arch_vpmu_ops core2_no_vpmu_ops = {
.do_cpuid = core2_no_vpmu_do_cpuid,
};
-int vmx_vpmu_initialise(struct vcpu *v, unsigned int vpmu_flags)
+int vmx_vpmu_initialise(struct vcpu *v)
{
struct vpmu_struct *vpmu = vcpu_vpmu(v);
uint8_t family = current_cpu_data.x86;
@@ -828,7 +828,7 @@ int vmx_vpmu_initialise(struct vcpu *v, unsigned int vpmu_flags)
int ret = 0;
vpmu->arch_vpmu_ops = &core2_no_vpmu_ops;
- if ( !vpmu_flags )
+ if ( vpmu_mode == XENPMU_MODE_OFF )
return 0;
if ( family == 6 )
@@ -867,7 +867,7 @@ int vmx_vpmu_initialise(struct vcpu *v, unsigned int vpmu_flags)
case 0x3f:
case 0x45:
case 0x46:
- ret = core2_vpmu_initialise(v, vpmu_flags);
+ ret = core2_vpmu_initialise(v);
if ( !ret )
vpmu->arch_vpmu_ops = &core2_vpmu_ops;
return ret;
diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
index a6e933a..50f6bb8 100644
--- a/xen/arch/x86/hvm/vpmu.c
+++ b/xen/arch/x86/hvm/vpmu.c
@@ -21,6 +21,7 @@
#include <xen/config.h>
#include <xen/sched.h>
#include <xen/xenoprof.h>
+#include <xen/guest_access.h>
#include <asm/regs.h>
#include <asm/types.h>
#include <asm/msr.h>
@@ -38,7 +39,8 @@
* "vpmu=off" : vpmu generally disabled
* "vpmu=bts" : vpmu enabled and Intel BTS feature switched on.
*/
-static unsigned int __read_mostly opt_vpmu_enabled;
+uint64_t __read_mostly vpmu_mode = XENPMU_MODE_OFF;
+uint64_t __read_mostly vpmu_features = 0;
static void parse_vpmu_param(char *s);
custom_param("vpmu", parse_vpmu_param);
@@ -52,7 +54,7 @@ static void __init parse_vpmu_param(char *s)
break;
default:
if ( !strcmp(s, "bts") )
- opt_vpmu_enabled |= VPMU_BOOT_BTS;
+ vpmu_features |= XENPMU_FEATURE_INTEL_BTS;
else if ( *s )
{
printk("VPMU: unknown flag: %s - vpmu disabled!\n", s);
@@ -60,7 +62,7 @@ static void __init parse_vpmu_param(char *s)
}
/* fall through */
case 1:
- opt_vpmu_enabled |= VPMU_BOOT_ENABLED;
+ vpmu_mode = XENPMU_MODE_ON;
break;
}
}
@@ -77,6 +79,9 @@ int vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
{
struct vpmu_struct *vpmu = vcpu_vpmu(current);
+ if ( !(vpmu_mode & XENPMU_MODE_ON) )
+ return 0;
+
if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->do_wrmsr )
return vpmu->arch_vpmu_ops->do_wrmsr(msr, msr_content);
return 0;
@@ -86,6 +91,9 @@ int vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content)
{
struct vpmu_struct *vpmu = vcpu_vpmu(current);
+ if ( !(vpmu_mode & XENPMU_MODE_ON) )
+ return 0;
+
if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->do_rdmsr )
return vpmu->arch_vpmu_ops->do_rdmsr(msr, msr_content);
return 0;
@@ -237,19 +245,19 @@ void vpmu_initialise(struct vcpu *v)
switch ( vendor )
{
case X86_VENDOR_AMD:
- if ( svm_vpmu_initialise(v, opt_vpmu_enabled) != 0 )
- opt_vpmu_enabled = 0;
+ if ( svm_vpmu_initialise(v) != 0 )
+ vpmu_mode = XENPMU_MODE_OFF;
return;
case X86_VENDOR_INTEL:
- if ( vmx_vpmu_initialise(v, opt_vpmu_enabled) != 0 )
- opt_vpmu_enabled = 0;
+ if ( vmx_vpmu_initialise(v) != 0 )
+ vpmu_mode = XENPMU_MODE_OFF;
return;
default:
printk("VPMU: Initialization failed. "
"Unknown CPU vendor %d\n", vendor);
- opt_vpmu_enabled = 0;
+ vpmu_mode = XENPMU_MODE_OFF;
return;
}
}
@@ -271,3 +279,100 @@ void vpmu_dump(struct vcpu *v)
vpmu->arch_vpmu_ops->arch_vpmu_dump(v);
}
+/* Unload VPMU contexts */
+static void vpmu_unload_all(void)
+{
+ struct domain *d;
+ struct vcpu *v;
+ struct vpmu_struct *vpmu;
+
+ for_each_domain(d)
+ {
+ for_each_vcpu ( d, v )
+ {
+ if ( v != current )
+ vcpu_pause(v);
+ vpmu = vcpu_vpmu(v);
+
+ if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
+ {
+ if ( v != current )
+ vcpu_unpause(v);
+ continue;
+ }
+
+ vpmu_set(vpmu, VPMU_CONTEXT_SAVE);
+ on_selected_cpus(cpumask_of(vpmu->last_pcpu),
+ vpmu_save_force, (void *)v, 1);
+ vpmu_reset(vpmu, VPMU_CONTEXT_LOADED);
+
+ if ( v != current )
+ vcpu_unpause(v);
+ }
+ }
+}
+
+
+long do_xenpmu_op(int op, XEN_GUEST_HANDLE_PARAM(xen_pmu_params_t) arg)
+{
+ int ret = -EINVAL;
+ xen_pmu_params_t pmu_params;
+
+ switch ( op )
+ {
+ case XENPMU_mode_set:
+ if ( !is_control_domain(current->domain) )
+ return -EPERM;
+
+ if ( copy_from_guest(&pmu_params, arg, 1) )
+ return -EFAULT;
+
+ if ( pmu_params.d.val & ~XENPMU_MODE_ON )
+ return -EINVAL;
+
+ vpmu_mode = pmu_params.d.val;
+ if ( vpmu_mode == XENPMU_MODE_OFF )
+ /*
+ * After this VPMU context will never be loaded during context
+ * switch. We also prevent PMU MSR accesses (which can load
+ * context) when VPMU is disabled.
+ */
+ vpmu_unload_all();
+
+ ret = 0;
+ break;
+
+ case XENPMU_mode_get:
+ pmu_params.d.val = vpmu_mode;
+ pmu_params.v.version.maj = XENPMU_VER_MAJ;
+ pmu_params.v.version.min = XENPMU_VER_MIN;
+ if ( copy_to_guest(arg, &pmu_params, 1) )
+ return -EFAULT;
+ ret = 0;
+ break;
+
+ case XENPMU_feature_set:
+ if ( !is_control_domain(current->domain) )
+ return -EPERM;
+
+ if ( copy_from_guest(&pmu_params, arg, 1) )
+ return -EFAULT;
+
+ if ( pmu_params.d.val & ~XENPMU_FEATURE_INTEL_BTS )
+ return -EINVAL;
+
+ vpmu_features = pmu_params.d.val;
+
+ ret = 0;
+ break;
+
+ case XENPMU_feature_get:
+ pmu_params.d.val = vpmu_mode;
+ if ( copy_to_guest(arg, &pmu_params, 1) )
+ return -EFAULT;
+ ret = 0;
+ break;
+ }
+
+ return ret;
+}
diff --git a/xen/arch/x86/x86_64/compat/entry.S b/xen/arch/x86/x86_64/compat/entry.S
index 594b0b9..07c736d 100644
--- a/xen/arch/x86/x86_64/compat/entry.S
+++ b/xen/arch/x86/x86_64/compat/entry.S
@@ -416,6 +416,8 @@ ENTRY(compat_hypercall_table)
.quad do_domctl
.quad compat_kexec_op
.quad do_tmem_op
+ .quad do_ni_hypercall /* reserved for XenClient */
+ .quad do_xenpmu_op /* 40 */
.rept __HYPERVISOR_arch_0-((.-compat_hypercall_table)/8)
.quad compat_ni_hypercall
.endr
@@ -464,6 +466,8 @@ ENTRY(compat_hypercall_args_table)
.byte 1 /* do_domctl */
.byte 2 /* compat_kexec_op */
.byte 1 /* do_tmem_op */
+ .byte 0 /* reserved for XenClient */
+ .byte 2 /* do_xenpmu_op */ /* 40 */
.rept __HYPERVISOR_arch_0-(.-compat_hypercall_args_table)
.byte 0 /* compat_ni_hypercall */
.endr
diff --git a/xen/arch/x86/x86_64/entry.S b/xen/arch/x86/x86_64/entry.S
index 3ea4683..c36ffce 100644
--- a/xen/arch/x86/x86_64/entry.S
+++ b/xen/arch/x86/x86_64/entry.S
@@ -757,6 +757,8 @@ ENTRY(hypercall_table)
.quad do_domctl
.quad do_kexec_op
.quad do_tmem_op
+ .quad do_ni_hypercall /* reserved for XenClient */
+ .quad do_xenpmu_op /* 40 */
.rept __HYPERVISOR_arch_0-((.-hypercall_table)/8)
.quad do_ni_hypercall
.endr
@@ -805,6 +807,8 @@ ENTRY(hypercall_args_table)
.byte 1 /* do_domctl */
.byte 2 /* do_kexec */
.byte 1 /* do_tmem_op */
+ .byte 0 /* reserved for XenClient */
+ .byte 2 /* do_xenpmu_op */ /* 40 */
.rept __HYPERVISOR_arch_0-(.-hypercall_args_table)
.byte 0 /* do_ni_hypercall */
.endr
diff --git a/xen/include/asm-x86/hvm/vpmu.h b/xen/include/asm-x86/hvm/vpmu.h
index edc67f6..b945e8f 100644
--- a/xen/include/asm-x86/hvm/vpmu.h
+++ b/xen/include/asm-x86/hvm/vpmu.h
@@ -24,13 +24,6 @@
#include <public/pmu.h>
-/*
- * Flag bits given as a string on the hypervisor boot parameter 'vpmu'.
- * See arch/x86/hvm/vpmu.c.
- */
-#define VPMU_BOOT_ENABLED 0x1 /* vpmu generally enabled. */
-#define VPMU_BOOT_BTS 0x2 /* Intel BTS feature wanted. */
-
#define vcpu_vpmu(vcpu) (&(vcpu)->arch.vpmu)
#define vpmu_vcpu(vpmu) container_of(vpmu, struct vcpu, arch.vpmu)
@@ -58,8 +51,8 @@ struct arch_vpmu_ops {
void (*arch_vpmu_dump)(const struct vcpu *);
};
-int vmx_vpmu_initialise(struct vcpu *, unsigned int flags);
-int svm_vpmu_initialise(struct vcpu *, unsigned int flags);
+int vmx_vpmu_initialise(struct vcpu *);
+int svm_vpmu_initialise(struct vcpu *);
struct vpmu_struct {
u32 flags;
@@ -98,5 +91,8 @@ void vpmu_dump(struct vcpu *v);
extern int acquire_pmu_ownership(int pmu_ownership);
extern void release_pmu_ownership(int pmu_ownership);
+extern uint64_t vpmu_mode;
+extern uint64_t vpmu_features;
+
#endif /* __ASM_X86_HVM_VPMU_H_*/
diff --git a/xen/include/public/pmu.h b/xen/include/public/pmu.h
index 3ffd2cf..f91d935 100644
--- a/xen/include/public/pmu.h
+++ b/xen/include/public/pmu.h
@@ -13,6 +13,54 @@
#define XENPMU_VER_MAJ 0
#define XENPMU_VER_MIN 0
+/*
+ * ` enum neg_errnoval
+ * ` HYPERVISOR_xenpmu_op(enum xenpmu_op cmd, struct xenpmu_params *args);
+ *
+ * @cmd == XENPMU_* (PMU operation)
+ * @args == struct xenpmu_params
+ */
+/* ` enum xenpmu_op { */
+#define XENPMU_mode_get 0 /* Also used for getting PMU version */
+#define XENPMU_mode_set 1
+#define XENPMU_feature_get 2
+#define XENPMU_feature_set 3
+/* ` } */
+
+/* Parameters structure for HYPERVISOR_xenpmu_op call */
+struct xen_pmu_params {
+ /* IN/OUT parameters */
+ union {
+ struct version {
+ uint8_t maj;
+ uint8_t min;
+ } version;
+ uint64_t pad;
+ } v;
+ union {
+ uint64_t val;
+ XEN_GUEST_HANDLE(void) valp;
+ } d;
+
+ /* IN parameters */
+ uint64_t vcpu;
+};
+typedef struct xen_pmu_params xen_pmu_params_t;
+DEFINE_XEN_GUEST_HANDLE(xen_pmu_params_t);
+
+/* PMU modes:
+ * - XENPMU_MODE_OFF: No PMU virtualization
+ * - XENPMU_MODE_ON: Guests can profile themselves, dom0 profiles
+ * itself and Xen
+ */
+#define XENPMU_MODE_OFF 0
+#define XENPMU_MODE_ON (1<<0)
+
+/*
+ * PMU features:
+ * - XENPMU_FEATURE_INTEL_BTS: Intel BTS support (ignored on AMD)
+ */
+#define XENPMU_FEATURE_INTEL_BTS 1
/* Shared between hypervisor and PV domain */
struct xen_pmu_data {
diff --git a/xen/include/public/xen.h b/xen/include/public/xen.h
index 8c5697e..a00ab21 100644
--- a/xen/include/public/xen.h
+++ b/xen/include/public/xen.h
@@ -101,6 +101,7 @@ DEFINE_XEN_GUEST_HANDLE(xen_ulong_t);
#define __HYPERVISOR_kexec_op 37
#define __HYPERVISOR_tmem_op 38
#define __HYPERVISOR_xc_reserved_op 39 /* reserved for XenClient */
+#define __HYPERVISOR_xenpmu_op 40
/* Architecture-specific hypercall definitions. */
#define __HYPERVISOR_arch_0 48
diff --git a/xen/include/xen/hypercall.h b/xen/include/xen/hypercall.h
index a9e5229..cf34547 100644
--- a/xen/include/xen/hypercall.h
+++ b/xen/include/xen/hypercall.h
@@ -14,6 +14,7 @@
#include <public/event_channel.h>
#include <public/tmem.h>
#include <public/version.h>
+#include <public/pmu.h>
#include <asm/hypercall.h>
#include <xsm/xsm.h>
@@ -139,6 +140,9 @@ do_tmem_op(
extern long
do_xenoprof_op(int op, XEN_GUEST_HANDLE_PARAM(void) arg);
+extern long
+do_xenpmu_op(int op, XEN_GUEST_HANDLE_PARAM(xen_pmu_params_t) arg);
+
#ifdef CONFIG_COMPAT
extern int
--
1.8.3.1
^ permalink raw reply related [flat|nested] 44+ messages in thread
* [PATCH v5 RESEND 10/17] x86/VPMU: Initialize PMU for PV guests
2014-04-23 12:50 [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Boris Ostrovsky
` (8 preceding siblings ...)
2014-04-23 12:50 ` [PATCH v5 RESEND 09/17] x86/VPMU: Interface for setting PMU mode and flags Boris Ostrovsky
@ 2014-04-23 12:50 ` Boris Ostrovsky
2014-04-26 8:21 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 11/17] x86/VPMU: Add support for PMU register handling on " Boris Ostrovsky
` (8 subsequent siblings)
18 siblings, 1 reply; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-23 12:50 UTC (permalink / raw)
To: kevin.tian
Cc: keir, jun.nakajima, andrew.cooper3, eddie.dong, donald.d.dugger,
xen-devel, dietmar.hahn, JBeulich, boris.ostrovsky,
suravee.suthikulpanit
Code for initializing/tearing down PMU for PV guests
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
xen/arch/x86/hvm/svm/svm.c | 6 ++-
xen/arch/x86/hvm/svm/vpmu.c | 40 +++++++++---------
xen/arch/x86/hvm/vmx/vmx.c | 6 ++-
xen/arch/x86/hvm/vmx/vpmu_core2.c | 51 +++++++++++++++--------
xen/arch/x86/hvm/vpmu.c | 85 ++++++++++++++++++++++++++++++++++++++-
xen/common/event_channel.c | 1 +
xen/include/asm-x86/hvm/vpmu.h | 1 +
xen/include/public/pmu.h | 2 +
xen/include/public/xen.h | 1 +
xen/include/xen/softirq.h | 1 +
10 files changed, 154 insertions(+), 40 deletions(-)
diff --git a/xen/arch/x86/hvm/svm/svm.c b/xen/arch/x86/hvm/svm/svm.c
index 406d394..9ee0c1f 100644
--- a/xen/arch/x86/hvm/svm/svm.c
+++ b/xen/arch/x86/hvm/svm/svm.c
@@ -1045,7 +1045,8 @@ static int svm_vcpu_initialise(struct vcpu *v)
return rc;
}
- vpmu_initialise(v);
+ if ( is_hvm_domain(v->domain) )
+ vpmu_initialise(v);
svm_guest_osvw_init(v);
@@ -1054,7 +1055,8 @@ static int svm_vcpu_initialise(struct vcpu *v)
static void svm_vcpu_destroy(struct vcpu *v)
{
- vpmu_destroy(v);
+ if ( is_hvm_domain(v->domain) )
+ vpmu_destroy(v);
svm_destroy_vmcb(v);
passive_domain_destroy(v);
}
diff --git a/xen/arch/x86/hvm/svm/vpmu.c b/xen/arch/x86/hvm/svm/vpmu.c
index 97cd6e5..346aa51 100644
--- a/xen/arch/x86/hvm/svm/vpmu.c
+++ b/xen/arch/x86/hvm/svm/vpmu.c
@@ -381,16 +381,21 @@ static int amd_vpmu_initialise(struct vcpu *v)
}
}
- ctxt = xzalloc_bytes(sizeof(struct xen_pmu_amd_ctxt) +
- sizeof(uint64_t) * AMD_MAX_COUNTERS +
- sizeof(uint64_t) * AMD_MAX_COUNTERS);
- if ( !ctxt )
+ if ( !is_pv_domain(v->domain) )
{
- gdprintk(XENLOG_WARNING, "Insufficient memory for PMU, "
- " PMU feature is unavailable on domain %d vcpu %d.\n",
- v->vcpu_id, v->domain->domain_id);
- return -ENOMEM;
+ ctxt = xzalloc_bytes(sizeof(struct xen_pmu_amd_ctxt) +
+ sizeof(uint64_t) * AMD_MAX_COUNTERS +
+ sizeof(uint64_t) * AMD_MAX_COUNTERS);
+ if ( !ctxt )
+ {
+ gdprintk(XENLOG_WARNING, "Insufficient memory for PMU, "
+ " PMU feature is unavailable on domain %d vcpu %d.\n",
+ v->vcpu_id, v->domain->domain_id);
+ return -ENOMEM;
+ }
}
+ else
+ ctxt = &v->arch.vpmu.xenpmu_data->pmu.c.amd;
ctxt->counters = sizeof(struct xen_pmu_amd_ctxt);
ctxt->ctrls = ctxt->counters + sizeof(uint64_t) * AMD_MAX_COUNTERS;
@@ -407,18 +412,17 @@ static void amd_vpmu_destroy(struct vcpu *v)
if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
return;
- if ( is_hvm_domain(v->domain) &&
- ((struct xen_pmu_amd_ctxt *)vpmu->context)->msr_bitmap_set )
- amd_vpmu_unset_msr_bitmap(v);
-
- xfree(vpmu->context);
- vpmu_reset(vpmu, VPMU_CONTEXT_ALLOCATED);
-
- if ( vpmu_is_set(vpmu, VPMU_RUNNING) )
+ if ( is_hvm_domain(v->domain) )
{
- vpmu_reset(vpmu, VPMU_RUNNING);
- release_pmu_ownship(PMU_OWNER_HVM);
+ if ( ((struct xen_pmu_amd_ctxt *)vpmu->context)->msr_bitmap_set )
+ amd_vpmu_unset_msr_bitmap(v);
+
+ xfree(vpmu->context);
}
+
+ vpmu->context = NULL;
+ vpmu_clear(vpmu);
+ release_pmu_ownship(PMU_OWNER_HVM);
}
/* VPMU part of the 'q' keyhandler */
diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index f6409d6..76c1bc8 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -112,7 +112,8 @@ static int vmx_vcpu_initialise(struct vcpu *v)
return rc;
}
- vpmu_initialise(v);
+ if ( is_hvm_domain(v->domain) )
+ vpmu_initialise(v);
vmx_install_vlapic_mapping(v);
@@ -126,7 +127,8 @@ static int vmx_vcpu_initialise(struct vcpu *v)
static void vmx_vcpu_destroy(struct vcpu *v)
{
vmx_destroy_vmcs(v);
- vpmu_destroy(v);
+ if ( is_hvm_domain(v->domain) )
+ vpmu_destroy(v);
passive_domain_destroy(v);
}
diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c b/xen/arch/x86/hvm/vmx/vpmu_core2.c
index efbebe2..de1e09d 100644
--- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
+++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
@@ -358,22 +358,30 @@ static int core2_vpmu_alloc_resource(struct vcpu *v)
struct vpmu_struct *vpmu = vcpu_vpmu(v);
struct xen_pmu_intel_ctxt *core2_vpmu_cxt;
- if ( !acquire_pmu_ownership(PMU_OWNER_HVM) )
- return 0;
+ if ( !is_pv_domain(v->domain) )
+ {
+ if ( !acquire_pmu_ownership(PMU_OWNER_HVM) )
+ return 0;
- wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0);
- if ( vmx_add_host_load_msr(MSR_CORE_PERF_GLOBAL_CTRL) )
- goto out_err;
+ wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0);
+ if ( vmx_add_host_load_msr(MSR_CORE_PERF_GLOBAL_CTRL) )
+ goto out_err;
- if ( vmx_add_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL) )
- goto out_err;
- vmx_write_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, 0);
+ if ( vmx_add_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL) )
+ goto out_err;
+ vmx_write_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, 0);
- core2_vpmu_cxt = xzalloc_bytes(sizeof(struct xen_pmu_intel_ctxt) +
- sizeof(uint64_t) * fixed_pmc_cnt +
- sizeof(struct xen_pmu_cntr_pair) * arch_pmc_cnt);
- if ( !core2_vpmu_cxt )
- goto out_err;
+ core2_vpmu_cxt = xzalloc_bytes(sizeof(struct xen_pmu_intel_ctxt) +
+ sizeof(uint64_t) * fixed_pmc_cnt +
+ sizeof(struct xen_pmu_cntr_pair) * arch_pmc_cnt);
+ if ( !core2_vpmu_cxt )
+ goto out_err;
+ }
+ else
+ {
+ core2_vpmu_cxt = &v->arch.vpmu.xenpmu_data->pmu.c.intel;
+ vpmu_set(vpmu, VPMU_CONTEXT_ALLOCATED);
+ }
core2_vpmu_cxt->fixed_counters = sizeof(struct xen_pmu_intel_ctxt);
core2_vpmu_cxt->arch_counters = core2_vpmu_cxt->fixed_counters +
@@ -753,6 +761,10 @@ func_out:
fixed_pmc_cnt = core2_get_fixed_pmc_count();
check_pmc_quirk();
+ /* PV domains can allocate resources immediately */
+ if ( is_pv_domain(v->domain) && !core2_vpmu_alloc_resource(v) )
+ return 1;
+
return 0;
}
@@ -763,11 +775,16 @@ static void core2_vpmu_destroy(struct vcpu *v)
if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
return;
- xfree(vpmu->context);
- if ( cpu_has_vmx_msr_bitmap && is_hvm_domain(v->domain) )
- core2_vpmu_unset_msr_bitmap(v->arch.hvm_vmx.msr_bitmap);
+ if ( is_hvm_domain(v->domain) )
+ {
+ xfree(vpmu->context);
+ if ( cpu_has_vmx_msr_bitmap )
+ core2_vpmu_unset_msr_bitmap(v->arch.hvm_vmx.msr_bitmap);
+ }
+
release_pmu_ownship(PMU_OWNER_HVM);
- vpmu_reset(vpmu, VPMU_CONTEXT_ALLOCATED);
+ vpmu->context = NULL;
+ vpmu_clear(vpmu);
}
struct arch_vpmu_ops core2_vpmu_ops = {
diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
index 50f6bb8..68897f6 100644
--- a/xen/arch/x86/hvm/vpmu.c
+++ b/xen/arch/x86/hvm/vpmu.c
@@ -21,10 +21,14 @@
#include <xen/config.h>
#include <xen/sched.h>
#include <xen/xenoprof.h>
+#include <xen/event.h>
+#include <xen/softirq.h>
+#include <xen/hypercall.h>
#include <xen/guest_access.h>
#include <asm/regs.h>
#include <asm/types.h>
#include <asm/msr.h>
+#include <asm/p2m.h>
#include <asm/hvm/support.h>
#include <asm/hvm/vmx/vmx.h>
#include <asm/hvm/vmx/vmcs.h>
@@ -267,7 +271,13 @@ void vpmu_destroy(struct vcpu *v)
struct vpmu_struct *vpmu = vcpu_vpmu(v);
if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->arch_vpmu_destroy )
+ {
+ /* Unload VPMU first. This will stop counters */
+ on_selected_cpus(cpumask_of(vcpu_vpmu(v)->last_pcpu),
+ vpmu_save_force, (void *)v, 1);
+
vpmu->arch_vpmu_ops->arch_vpmu_destroy(v);
+ }
}
/* Dump some vpmu informations on console. Used in keyhandler dump_domains(). */
@@ -312,6 +322,67 @@ static void vpmu_unload_all(void)
}
}
+static int pvpmu_init(struct domain *d, xen_pmu_params_t *params)
+{
+ struct vcpu *v;
+ struct page_info *page;
+ uint64_t gfn = params->d.val;
+
+ if ( !is_pv_domain(d) )
+ return -EINVAL;
+
+ if ( params->vcpu < 0 || params->vcpu >= d->max_vcpus )
+ return -EINVAL;
+
+ page = get_page_from_gfn(d, gfn, NULL, P2M_ALLOC);
+ if ( !page )
+ return -EINVAL;
+
+ if ( !get_page_type(page, PGT_writable_page) )
+ {
+ put_page(page);
+ return -EINVAL;
+ }
+
+ v = d->vcpu[params->vcpu];
+ v->arch.vpmu.xenpmu_data = __map_domain_page_global(page);
+ if ( !v->arch.vpmu.xenpmu_data )
+ {
+ put_page_and_type(page);
+ return -EINVAL;
+ }
+
+ vpmu_initialise(v);
+
+ return 0;
+}
+
+static void pvpmu_finish(struct domain *d, xen_pmu_params_t *params)
+{
+ struct vcpu *v;
+ uint64_t mfn;
+
+ if ( params->vcpu < 0 || params->vcpu >= d->max_vcpus )
+ return;
+
+ v = d->vcpu[params->vcpu];
+ if (v != current)
+ vcpu_pause(v);
+
+ if ( v->arch.vpmu.xenpmu_data )
+ {
+ mfn = domain_page_map_to_mfn(v->arch.vpmu.xenpmu_data);
+ if ( mfn_valid(mfn) )
+ {
+ unmap_domain_page_global(v->arch.vpmu.xenpmu_data);
+ put_page_and_type(mfn_to_page(mfn));
+ }
+ }
+ vpmu_destroy(v);
+
+ if (v != current)
+ vcpu_unpause(v);
+}
long do_xenpmu_op(int op, XEN_GUEST_HANDLE_PARAM(xen_pmu_params_t) arg)
{
@@ -372,7 +443,19 @@ long do_xenpmu_op(int op, XEN_GUEST_HANDLE_PARAM(xen_pmu_params_t) arg)
return -EFAULT;
ret = 0;
break;
- }
+
+ case XENPMU_init:
+ if ( copy_from_guest(&pmu_params, arg, 1) )
+ return -EFAULT;
+ ret = pvpmu_init(current->domain, &pmu_params);
+ break;
+
+ case XENPMU_finish:
+ if ( copy_from_guest(&pmu_params, arg, 1) )
+ return -EFAULT;
+ pvpmu_finish(current->domain, &pmu_params);
+ break;
+ }
return ret;
}
diff --git a/xen/common/event_channel.c b/xen/common/event_channel.c
index db952af..f0aaa63 100644
--- a/xen/common/event_channel.c
+++ b/xen/common/event_channel.c
@@ -108,6 +108,7 @@ static int virq_is_global(uint32_t virq)
case VIRQ_TIMER:
case VIRQ_DEBUG:
case VIRQ_XENOPROF:
+ case VIRQ_XENPMU:
rc = 0;
break;
case VIRQ_ARCH_0 ... VIRQ_ARCH_7:
diff --git a/xen/include/asm-x86/hvm/vpmu.h b/xen/include/asm-x86/hvm/vpmu.h
index b945e8f..0f3de14 100644
--- a/xen/include/asm-x86/hvm/vpmu.h
+++ b/xen/include/asm-x86/hvm/vpmu.h
@@ -60,6 +60,7 @@ struct vpmu_struct {
u32 hw_lapic_lvtpc;
void *context;
struct arch_vpmu_ops *arch_vpmu_ops;
+ xen_pmu_data_t *xenpmu_data;
};
/* VPMU states */
diff --git a/xen/include/public/pmu.h b/xen/include/public/pmu.h
index f91d935..814e061 100644
--- a/xen/include/public/pmu.h
+++ b/xen/include/public/pmu.h
@@ -25,6 +25,8 @@
#define XENPMU_mode_set 1
#define XENPMU_feature_get 2
#define XENPMU_feature_set 3
+#define XENPMU_init 4
+#define XENPMU_finish 5
/* ` } */
/* Parameters structure for HYPERVISOR_xenpmu_op call */
diff --git a/xen/include/public/xen.h b/xen/include/public/xen.h
index a00ab21..2eb5fd7 100644
--- a/xen/include/public/xen.h
+++ b/xen/include/public/xen.h
@@ -161,6 +161,7 @@ DEFINE_XEN_GUEST_HANDLE(xen_ulong_t);
#define VIRQ_MEM_EVENT 10 /* G. (DOM0) A memory event has occured */
#define VIRQ_XC_RESERVED 11 /* G. Reserved for XenClient */
#define VIRQ_ENOMEM 12 /* G. (DOM0) Low on heap memory */
+#define VIRQ_XENPMU 13 /* V. PMC interrupt */
/* Architecture-specific VIRQ definitions. */
#define VIRQ_ARCH_0 16
diff --git a/xen/include/xen/softirq.h b/xen/include/xen/softirq.h
index 0c0d481..5829fa4 100644
--- a/xen/include/xen/softirq.h
+++ b/xen/include/xen/softirq.h
@@ -8,6 +8,7 @@ enum {
NEW_TLBFLUSH_CLOCK_PERIOD_SOFTIRQ,
RCU_SOFTIRQ,
TASKLET_SOFTIRQ,
+ PMU_SOFTIRQ,
NR_COMMON_SOFTIRQS
};
--
1.8.3.1
^ permalink raw reply related [flat|nested] 44+ messages in thread
* [PATCH v5 RESEND 11/17] x86/VPMU: Add support for PMU register handling on PV guests
2014-04-23 12:50 [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Boris Ostrovsky
` (9 preceding siblings ...)
2014-04-23 12:50 ` [PATCH v5 RESEND 10/17] x86/VPMU: Initialize PMU for PV guests Boris Ostrovsky
@ 2014-04-23 12:50 ` Boris Ostrovsky
2014-04-26 8:26 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 12/17] x86/VPMU: Handle PMU interrupts for " Boris Ostrovsky
` (7 subsequent siblings)
18 siblings, 1 reply; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-23 12:50 UTC (permalink / raw)
To: kevin.tian
Cc: keir, jun.nakajima, andrew.cooper3, eddie.dong, donald.d.dugger,
xen-devel, dietmar.hahn, JBeulich, boris.ostrovsky,
suravee.suthikulpanit
Intercept accesses to PMU MSRs and process them in VPMU module.
Dump VPMU state for all domains (HVM and PV) when requested.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
xen/arch/x86/domain.c | 3 +-
xen/arch/x86/hvm/vmx/vpmu_core2.c | 60 ++++++++++++++++++++++++++++++++-------
xen/arch/x86/hvm/vpmu.c | 7 +++++
xen/arch/x86/traps.c | 31 +++++++++++++++++++-
xen/include/public/pmu.h | 1 +
5 files changed, 89 insertions(+), 13 deletions(-)
diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c
index b615c07..b389abc 100644
--- a/xen/arch/x86/domain.c
+++ b/xen/arch/x86/domain.c
@@ -1995,8 +1995,7 @@ void arch_dump_vcpu_info(struct vcpu *v)
{
paging_dump_vcpu_info(v);
- if ( is_hvm_vcpu(v) )
- vpmu_dump(v);
+ vpmu_dump(v);
}
void domain_cpuid(
diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c b/xen/arch/x86/hvm/vmx/vpmu_core2.c
index de1e09d..9eac418 100644
--- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
+++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
@@ -27,6 +27,7 @@
#include <asm/regs.h>
#include <asm/types.h>
#include <asm/apic.h>
+#include <asm/traps.h>
#include <asm/msr.h>
#include <asm/msr-index.h>
#include <asm/hvm/support.h>
@@ -297,19 +298,26 @@ static inline void __core2_vpmu_save(struct vcpu *v)
rdmsrl(MSR_CORE_PERF_FIXED_CTR0 + i, fixed_counters[i]);
for ( i = 0; i < arch_pmc_cnt; i++ )
rdmsrl(MSR_IA32_PERFCTR0 + i, xen_pmu_cntr_pair[i].counter);
+
+ if ( is_pv_domain(v->domain) )
+ rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS, core2_vpmu_cxt->global_status);
}
static int core2_vpmu_save(struct vcpu *v)
{
struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ if ( is_pv_domain(v->domain) )
+ wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0);
+
if ( !vpmu_is_set_all(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED) )
return 0;
__core2_vpmu_save(v);
/* Unset PMU MSR bitmap to trap lazy load. */
- if ( !vpmu_is_set(vpmu, VPMU_RUNNING) && cpu_has_vmx_msr_bitmap )
+ if ( !vpmu_is_set(vpmu, VPMU_RUNNING) && cpu_has_vmx_msr_bitmap
+ && !is_pv_domain(v->domain) )
core2_vpmu_unset_msr_bitmap(v->arch.hvm_vmx.msr_bitmap);
return 1;
@@ -339,6 +347,13 @@ static inline void __core2_vpmu_load(struct vcpu *v)
wrmsrl(MSR_CORE_PERF_FIXED_CTR_CTRL, core2_vpmu_cxt->fixed_ctrl);
wrmsrl(MSR_IA32_DS_AREA, core2_vpmu_cxt->ds_area);
wrmsrl(MSR_IA32_PEBS_ENABLE, core2_vpmu_cxt->pebs_enable);
+
+ if ( is_pv_domain(v->domain) )
+ {
+ wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, core2_vpmu_cxt->global_ovf_ctrl);
+ core2_vpmu_cxt->global_ovf_ctrl = 0;
+ wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, core2_vpmu_cxt->global_ctrl);
+ }
}
static void core2_vpmu_load(struct vcpu *v)
@@ -426,6 +441,14 @@ static int core2_vpmu_msr_common_check(u32 msr_index, int *type, int *index)
return 1;
}
+static void inject_trap(struct vcpu *v, unsigned int trapno)
+{
+ if ( !is_pv_domain(v->domain) )
+ hvm_inject_hw_exception(trapno, 0);
+ else
+ send_guest_trap(v->domain, v->vcpu_id, trapno);
+}
+
static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
{
u64 global_ctrl, non_global_ctrl;
@@ -452,7 +475,7 @@ static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
if ( vpmu_is_set(vpmu, VPMU_CPU_HAS_BTS) )
return 1;
gdprintk(XENLOG_WARNING, "Debug Store is not supported on this cpu\n");
- hvm_inject_hw_exception(TRAP_gp_fault, 0);
+ inject_trap(v, TRAP_gp_fault);
return 0;
}
}
@@ -464,11 +487,12 @@ static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
{
case MSR_CORE_PERF_GLOBAL_OVF_CTRL:
core2_vpmu_cxt->global_status &= ~msr_content;
+ wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, msr_content);
return 1;
case MSR_CORE_PERF_GLOBAL_STATUS:
gdprintk(XENLOG_INFO, "Can not write readonly MSR: "
"MSR_PERF_GLOBAL_STATUS(0x38E)!\n");
- hvm_inject_hw_exception(TRAP_gp_fault, 0);
+ inject_trap(v, TRAP_gp_fault);
return 1;
case MSR_IA32_PEBS_ENABLE:
if ( msr_content & 1 )
@@ -484,7 +508,7 @@ static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
gdprintk(XENLOG_WARNING,
"Illegal address for IA32_DS_AREA: %#" PRIx64 "x\n",
msr_content);
- hvm_inject_hw_exception(TRAP_gp_fault, 0);
+ inject_trap(v, TRAP_gp_fault);
return 1;
}
core2_vpmu_cxt->ds_area = msr_content;
@@ -509,10 +533,14 @@ static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
non_global_ctrl >>= FIXED_CTR_CTRL_BITS;
global_ctrl >>= 1;
}
+ core2_vpmu_cxt->global_ctrl = msr_content;
break;
case MSR_CORE_PERF_FIXED_CTR_CTRL:
non_global_ctrl = msr_content;
- vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, &global_ctrl);
+ if ( !is_pv_domain(v->domain) )
+ vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, &global_ctrl);
+ else
+ rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, global_ctrl);
global_ctrl >>= 32;
for ( i = 0; i < fixed_pmc_cnt; i++ )
{
@@ -529,7 +557,10 @@ static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
struct xen_pmu_cntr_pair *xen_pmu_cntr_pair =
vpmu_reg_pointer(core2_vpmu_cxt, arch_counters);
- vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, &global_ctrl);
+ if ( !is_pv_domain(v->domain) )
+ vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, &global_ctrl);
+ else
+ rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, global_ctrl);
xen_pmu_cntr_pair[tmp].control = msr_content;
for ( i = 0; i < arch_pmc_cnt && !pmu_enable; i++ )
pmu_enable += (global_ctrl >> i) &
@@ -568,13 +599,19 @@ static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
inject_gp = 1;
break;
}
- if (inject_gp)
- hvm_inject_hw_exception(TRAP_gp_fault, 0);
+
+ if (inject_gp)
+ inject_trap(v, TRAP_gp_fault);
else
wrmsrl(msr, msr_content);
}
else
- vmx_write_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, msr_content);
+ {
+ if ( !is_pv_domain(v->domain) )
+ vmx_write_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, msr_content);
+ else
+ wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, msr_content);
+ }
return 1;
}
@@ -598,7 +635,10 @@ static int core2_vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content)
*msr_content = core2_vpmu_cxt->global_status;
break;
case MSR_CORE_PERF_GLOBAL_CTRL:
- vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, msr_content);
+ if ( !is_pv_domain(v->domain) )
+ vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, msr_content);
+ else
+ rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, *msr_content);
break;
default:
rdmsrl(msr, *msr_content);
diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
index 68897f6..789eb2a 100644
--- a/xen/arch/x86/hvm/vpmu.c
+++ b/xen/arch/x86/hvm/vpmu.c
@@ -455,6 +455,13 @@ long do_xenpmu_op(int op, XEN_GUEST_HANDLE_PARAM(xen_pmu_params_t) arg)
return -EFAULT;
pvpmu_finish(current->domain, &pmu_params);
break;
+
+ case XENPMU_lvtpc_set:
+ if ( current->arch.vpmu.xenpmu_data == NULL )
+ return -EINVAL;
+ vpmu_lvtpc_update(current->arch.vpmu.xenpmu_data->pmu.l.lapic_lvtpc);
+ ret = 0;
+ break;
}
return ret;
diff --git a/xen/arch/x86/traps.c b/xen/arch/x86/traps.c
index 0bd43b9..442d3fb 100644
--- a/xen/arch/x86/traps.c
+++ b/xen/arch/x86/traps.c
@@ -72,6 +72,7 @@
#include <asm/apic.h>
#include <asm/mc146818rtc.h>
#include <asm/hpet.h>
+#include <asm/hvm/vpmu.h>
#include <public/arch-x86/cpuid.h>
#include <xsm/xsm.h>
@@ -865,8 +866,10 @@ void pv_cpuid(struct cpu_user_regs *regs)
__clear_bit(X86_FEATURE_TOPOEXT % 32, &c);
break;
+ case 0x0000000a: /* Architectural Performance Monitor Features (Intel) */
+ break;
+
case 0x00000005: /* MONITOR/MWAIT */
- case 0x0000000a: /* Architectural Performance Monitor Features */
case 0x0000000b: /* Extended Topology Enumeration */
case 0x8000000a: /* SVM revision and features */
case 0x8000001b: /* Instruction Based Sampling */
@@ -882,6 +885,8 @@ void pv_cpuid(struct cpu_user_regs *regs)
}
out:
+ vpmu_do_cpuid(regs->eax, &a, &b, &c, &d);
+
regs->eax = a;
regs->ebx = b;
regs->ecx = c;
@@ -2497,6 +2502,14 @@ static int emulate_privileged_op(struct cpu_user_regs *regs)
if ( wrmsr_safe(regs->ecx, msr_content) != 0 )
goto fail;
break;
+ case MSR_P6_PERFCTR0...MSR_P6_PERFCTR1:
+ case MSR_P6_EVNTSEL0...MSR_P6_EVNTSEL1:
+ case MSR_CORE_PERF_FIXED_CTR0...MSR_CORE_PERF_FIXED_CTR2:
+ case MSR_CORE_PERF_FIXED_CTR_CTRL...MSR_CORE_PERF_GLOBAL_OVF_CTRL:
+ case MSR_AMD_FAM15H_EVNTSEL0...MSR_AMD_FAM15H_PERFCTR5:
+ if ( !vpmu_do_wrmsr(regs->ecx, msr_content) )
+ goto invalid;
+ break;
default:
if ( wrmsr_hypervisor_regs(regs->ecx, msr_content) == 1 )
break;
@@ -2584,6 +2597,22 @@ static int emulate_privileged_op(struct cpu_user_regs *regs)
regs->eax = (uint32_t)msr_content;
regs->edx = (uint32_t)(msr_content >> 32);
break;
+ case MSR_IA32_PERF_CAPABILITIES:
+ /* No extra capabilities are supported */
+ regs->eax = regs->edx = 0;
+ break;
+ case MSR_P6_PERFCTR0...MSR_P6_PERFCTR1:
+ case MSR_P6_EVNTSEL0...MSR_P6_EVNTSEL1:
+ case MSR_CORE_PERF_FIXED_CTR0...MSR_CORE_PERF_FIXED_CTR2:
+ case MSR_CORE_PERF_FIXED_CTR_CTRL...MSR_CORE_PERF_GLOBAL_OVF_CTRL:
+ case MSR_AMD_FAM15H_EVNTSEL0...MSR_AMD_FAM15H_PERFCTR5:
+ if ( vpmu_do_rdmsr(regs->ecx, &msr_content) )
+ {
+ regs->eax = (uint32_t)msr_content;
+ regs->edx = (uint32_t)(msr_content >> 32);
+ break;
+ }
+ goto rdmsr_normal;
default:
if ( rdmsr_hypervisor_regs(regs->ecx, &val) )
{
diff --git a/xen/include/public/pmu.h b/xen/include/public/pmu.h
index 814e061..81783de 100644
--- a/xen/include/public/pmu.h
+++ b/xen/include/public/pmu.h
@@ -27,6 +27,7 @@
#define XENPMU_feature_set 3
#define XENPMU_init 4
#define XENPMU_finish 5
+#define XENPMU_lvtpc_set 6
/* ` } */
/* Parameters structure for HYPERVISOR_xenpmu_op call */
--
1.8.3.1
^ permalink raw reply related [flat|nested] 44+ messages in thread
* [PATCH v5 RESEND 12/17] x86/VPMU: Handle PMU interrupts for PV guests
2014-04-23 12:50 [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Boris Ostrovsky
` (10 preceding siblings ...)
2014-04-23 12:50 ` [PATCH v5 RESEND 11/17] x86/VPMU: Add support for PMU register handling on " Boris Ostrovsky
@ 2014-04-23 12:50 ` Boris Ostrovsky
2014-04-26 8:33 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 13/17] x86/VPMU: Add privileged PMU mode Boris Ostrovsky
` (6 subsequent siblings)
18 siblings, 1 reply; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-23 12:50 UTC (permalink / raw)
To: kevin.tian
Cc: keir, jun.nakajima, andrew.cooper3, eddie.dong, donald.d.dugger,
xen-devel, dietmar.hahn, JBeulich, boris.ostrovsky,
suravee.suthikulpanit
Add support for handling PMU interrupts for PV guests.
VPMU for the interrupted VCPU is unloaded until the guest issues XENPMU_flush
hypercall. This allows the guest to access PMU MSR values that are stored in
VPMU context which is shared between hypervisor and domain, thus avoiding
traps to hypervisor.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
xen/arch/x86/hvm/vpmu.c | 110 ++++++++++++++++++++++++++++++++++++++++++++---
xen/include/public/pmu.h | 7 +++
2 files changed, 112 insertions(+), 5 deletions(-)
diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
index 789eb2a..abc4c1f 100644
--- a/xen/arch/x86/hvm/vpmu.c
+++ b/xen/arch/x86/hvm/vpmu.c
@@ -76,7 +76,12 @@ void vpmu_lvtpc_update(uint32_t val)
struct vpmu_struct *vpmu = vcpu_vpmu(current);
vpmu->hw_lapic_lvtpc = PMU_APIC_VECTOR | (val & APIC_LVT_MASKED);
- apic_write(APIC_LVTPC, vpmu->hw_lapic_lvtpc);
+
+ /* Postpone APIC updates for PV guests if PMU interrupt is pending */
+ if ( !is_pv_domain(current->domain) ||
+ !(current->arch.vpmu.xenpmu_data &&
+ current->arch.vpmu.xenpmu_data->pmu_flags & PMU_CACHED) )
+ apic_write(APIC_LVTPC, vpmu->hw_lapic_lvtpc);
}
int vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
@@ -87,7 +92,23 @@ int vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
return 0;
if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->do_wrmsr )
- return vpmu->arch_vpmu_ops->do_wrmsr(msr, msr_content);
+ {
+ int ret = vpmu->arch_vpmu_ops->do_wrmsr(msr, msr_content);
+
+ /*
+ * We may have received a PMU interrupt during WRMSR handling
+ * and since do_wrmsr may load VPMU context we should save
+ * (and unload) it again.
+ */
+ if ( !is_hvm_domain(current->domain) &&
+ (current->arch.vpmu.xenpmu_data->pmu_flags & PMU_CACHED) )
+ {
+ vpmu_set(vpmu, VPMU_CONTEXT_SAVE);
+ vpmu->arch_vpmu_ops->arch_vpmu_save(current);
+ vpmu_reset(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED);
+ }
+ return ret;
+ }
return 0;
}
@@ -99,14 +120,86 @@ int vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content)
return 0;
if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->do_rdmsr )
- return vpmu->arch_vpmu_ops->do_rdmsr(msr, msr_content);
+ {
+ int ret = vpmu->arch_vpmu_ops->do_rdmsr(msr, msr_content);
+
+ if ( !is_hvm_domain(current->domain) &&
+ (current->arch.vpmu.xenpmu_data->pmu_flags & PMU_CACHED) )
+ {
+ vpmu_set(vpmu, VPMU_CONTEXT_SAVE);
+ vpmu->arch_vpmu_ops->arch_vpmu_save(current);
+ vpmu_reset(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED);
+ }
+ return ret;
+ }
return 0;
}
int vpmu_do_interrupt(struct cpu_user_regs *regs)
{
struct vcpu *v = current;
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ struct vpmu_struct *vpmu;
+
+ /* dom0 will handle this interrupt */
+ if ( v->domain->domain_id >= DOMID_FIRST_RESERVED )
+ v = dom0->vcpu[smp_processor_id() % dom0->max_vcpus];
+
+ vpmu = vcpu_vpmu(v);
+ if ( !is_hvm_domain(v->domain) )
+ {
+ /* PV guest or dom0 is doing system profiling */
+ const struct cpu_user_regs *gregs;
+ int err;
+
+ if ( v->arch.vpmu.xenpmu_data->pmu_flags & PMU_CACHED )
+ return 1;
+
+ /* PV guest will be reading PMU MSRs from xenpmu_data */
+ vpmu_set(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED);
+ err = vpmu->arch_vpmu_ops->arch_vpmu_save(v);
+ vpmu_reset(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED);
+
+ /* Store appropriate registers in xenpmu_data */
+ if ( is_pv_32bit_domain(current->domain) )
+ {
+ /*
+ * 32-bit dom0 cannot process Xen's addresses (which are 64 bit)
+ * and therefore we treat it the same way as a non-priviledged
+ * PV 32-bit domain.
+ */
+ struct compat_cpu_user_regs *cmp;
+
+ gregs = guest_cpu_user_regs();
+
+ cmp = (void *)&v->arch.vpmu.xenpmu_data->pmu.r.regs;
+ XLAT_cpu_user_regs(cmp, gregs);
+ memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
+ &cmp, sizeof(struct compat_cpu_user_regs));
+ }
+ else if ( !is_control_domain(current->domain) &&
+ !is_idle_vcpu(current) )
+ {
+ /* PV guest */
+ gregs = guest_cpu_user_regs();
+ memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
+ gregs, sizeof(struct cpu_user_regs));
+ }
+ else
+ memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
+ regs, sizeof(struct cpu_user_regs));
+
+ v->arch.vpmu.xenpmu_data->domain_id = current->domain->domain_id;
+ v->arch.vpmu.xenpmu_data->vcpu_id = current->vcpu_id;
+ v->arch.vpmu.xenpmu_data->pcpu_id = smp_processor_id();
+
+ v->arch.vpmu.xenpmu_data->pmu_flags |= PMU_CACHED;
+ apic_write(APIC_LVTPC, vpmu->hw_lapic_lvtpc | APIC_LVT_MASKED);
+ vpmu->hw_lapic_lvtpc |= APIC_LVT_MASKED;
+
+ send_guest_vcpu_virq(v, VIRQ_XENPMU);
+
+ return 1;
+ }
if ( vpmu->arch_vpmu_ops )
{
@@ -225,7 +318,8 @@ void vpmu_load(struct vcpu *v)
local_irq_enable();
/* Only when PMU is counting, we load PMU context immediately. */
- if ( !vpmu_is_set(vpmu, VPMU_RUNNING) )
+ if ( !vpmu_is_set(vpmu, VPMU_RUNNING) ||
+ (is_pv_domain(v->domain) && vpmu->xenpmu_data->pmu_flags & PMU_CACHED) )
return;
if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->arch_vpmu_load )
@@ -462,6 +556,12 @@ long do_xenpmu_op(int op, XEN_GUEST_HANDLE_PARAM(xen_pmu_params_t) arg)
vpmu_lvtpc_update(current->arch.vpmu.xenpmu_data->pmu.l.lapic_lvtpc);
ret = 0;
break;
+ case XENPMU_flush:
+ current->arch.vpmu.xenpmu_data->pmu_flags &= ~PMU_CACHED;
+ vpmu_lvtpc_update(current->arch.vpmu.xenpmu_data->pmu.l.lapic_lvtpc);
+ vpmu_load(current);
+ ret = 0;
+ break;
}
return ret;
diff --git a/xen/include/public/pmu.h b/xen/include/public/pmu.h
index 81783de..50f6d6d 100644
--- a/xen/include/public/pmu.h
+++ b/xen/include/public/pmu.h
@@ -28,6 +28,7 @@
#define XENPMU_init 4
#define XENPMU_finish 5
#define XENPMU_lvtpc_set 6
+#define XENPMU_flush 7 /* Write cached MSR values to HW */
/* ` } */
/* Parameters structure for HYPERVISOR_xenpmu_op call */
@@ -65,6 +66,12 @@ DEFINE_XEN_GUEST_HANDLE(xen_pmu_params_t);
*/
#define XENPMU_FEATURE_INTEL_BTS 1
+/*
+ * PMU MSRs are cached in the context so the PV guest doesn't need to trap to
+ * the hypervisor
+ */
+#define PMU_CACHED 1
+
/* Shared between hypervisor and PV domain */
struct xen_pmu_data {
uint32_t domain_id;
--
1.8.3.1
^ permalink raw reply related [flat|nested] 44+ messages in thread
* [PATCH v5 RESEND 13/17] x86/VPMU: Add privileged PMU mode
2014-04-23 12:50 [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Boris Ostrovsky
` (11 preceding siblings ...)
2014-04-23 12:50 ` [PATCH v5 RESEND 12/17] x86/VPMU: Handle PMU interrupts for " Boris Ostrovsky
@ 2014-04-23 12:50 ` Boris Ostrovsky
2014-04-26 8:39 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 14/17] x86/VPMU: Save VPMU state for PV guests during context switch Boris Ostrovsky
` (5 subsequent siblings)
18 siblings, 1 reply; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-23 12:50 UTC (permalink / raw)
To: kevin.tian
Cc: keir, jun.nakajima, andrew.cooper3, eddie.dong, donald.d.dugger,
xen-devel, dietmar.hahn, JBeulich, boris.ostrovsky,
suravee.suthikulpanit
Add support for privileged PMU mode which allows privileged domain (dom0)
profile both itself (and the hypervisor) and the guests. While this mode is on
profiling in guests is disabled.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
xen/arch/x86/hvm/vpmu.c | 97 +++++++++++++++++++++++++++++++++---------------
xen/arch/x86/traps.c | 6 ++-
xen/include/public/pmu.h | 3 ++
3 files changed, 76 insertions(+), 30 deletions(-)
diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
index abc4c1f..dc416f9 100644
--- a/xen/arch/x86/hvm/vpmu.c
+++ b/xen/arch/x86/hvm/vpmu.c
@@ -88,7 +88,8 @@ int vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
{
struct vpmu_struct *vpmu = vcpu_vpmu(current);
- if ( !(vpmu_mode & XENPMU_MODE_ON) )
+ if ( (vpmu_mode == XENPMU_MODE_OFF) ||
+ ((vpmu_mode & XENPMU_MODE_PRIV) && !is_control_domain(current->domain)) )
return 0;
if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->do_wrmsr )
@@ -116,7 +117,8 @@ int vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content)
{
struct vpmu_struct *vpmu = vcpu_vpmu(current);
- if ( !(vpmu_mode & XENPMU_MODE_ON) )
+ if ( (vpmu_mode == XENPMU_MODE_OFF) ||
+ ((vpmu_mode & XENPMU_MODE_PRIV) && !is_control_domain(current->domain)) )
return 0;
if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->do_rdmsr )
@@ -141,14 +143,18 @@ int vpmu_do_interrupt(struct cpu_user_regs *regs)
struct vpmu_struct *vpmu;
/* dom0 will handle this interrupt */
- if ( v->domain->domain_id >= DOMID_FIRST_RESERVED )
+ if ( (vpmu_mode & XENPMU_MODE_PRIV) ||
+ (v->domain->domain_id >= DOMID_FIRST_RESERVED) )
v = dom0->vcpu[smp_processor_id() % dom0->max_vcpus];
vpmu = vcpu_vpmu(v);
- if ( !is_hvm_domain(v->domain) )
+ if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
+ return 0;
+
+ if ( !is_hvm_domain(v->domain) || (vpmu_mode & XENPMU_MODE_PRIV) )
{
/* PV guest or dom0 is doing system profiling */
- const struct cpu_user_regs *gregs;
+ struct cpu_user_regs *gregs;
int err;
if ( v->arch.vpmu.xenpmu_data->pmu_flags & PMU_CACHED )
@@ -159,34 +165,62 @@ int vpmu_do_interrupt(struct cpu_user_regs *regs)
err = vpmu->arch_vpmu_ops->arch_vpmu_save(v);
vpmu_reset(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED);
- /* Store appropriate registers in xenpmu_data */
- if ( is_pv_32bit_domain(current->domain) )
+ if ( !is_hvm_domain(current->domain) )
{
- /*
- * 32-bit dom0 cannot process Xen's addresses (which are 64 bit)
- * and therefore we treat it the same way as a non-priviledged
- * PV 32-bit domain.
- */
- struct compat_cpu_user_regs *cmp;
-
- gregs = guest_cpu_user_regs();
+ /* Store appropriate registers in xenpmu_data */
+ if ( is_pv_32bit_domain(current->domain) )
+ {
+ gregs = guest_cpu_user_regs();
+
+ if ( (vpmu_mode & XENPMU_MODE_PRIV) &&
+ !is_pv_32bit_domain(v->domain) )
+ memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
+ gregs, sizeof(struct cpu_user_regs));
+ else
+ {
+ /*
+ * 32-bit dom0 cannot process Xen's addresses (which are
+ * 64 bit) and therefore we treat it the same way as a
+ * non-priviledged PV 32-bit domain.
+ */
+
+ struct compat_cpu_user_regs *cmp;
+
+ cmp = (struct compat_cpu_user_regs *)
+ &v->arch.vpmu.xenpmu_data->pmu.r.regs;
+ XLAT_cpu_user_regs(cmp, gregs);
+ memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
+ &cmp, sizeof(struct compat_cpu_user_regs));
+ }
+ }
+ else if ( !is_control_domain(current->domain) &&
+ !is_idle_vcpu(current) )
+ {
+ /* PV guest */
+ gregs = guest_cpu_user_regs();
+ memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
+ gregs, sizeof(struct cpu_user_regs));
+ }
+ else
+ memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
+ regs, sizeof(struct cpu_user_regs));
- cmp = (void *)&v->arch.vpmu.xenpmu_data->pmu.r.regs;
- XLAT_cpu_user_regs(cmp, gregs);
- memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
- &cmp, sizeof(struct compat_cpu_user_regs));
+ gregs = &v->arch.vpmu.xenpmu_data->pmu.r.regs;
+ gregs->cs = (current->arch.flags & TF_kernel_mode) ? 0 : 0x3;
}
- else if ( !is_control_domain(current->domain) &&
- !is_idle_vcpu(current) )
+ else
{
- /* PV guest */
+ /* HVM guest */
+ struct segment_register cs;
+
gregs = guest_cpu_user_regs();
memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
gregs, sizeof(struct cpu_user_regs));
+
+ hvm_get_segment_register(current, x86_seg_cs, &cs);
+ gregs = &v->arch.vpmu.xenpmu_data->pmu.r.regs;
+ gregs->cs = cs.attr.fields.dpl;
}
- else
- memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
- regs, sizeof(struct cpu_user_regs));
v->arch.vpmu.xenpmu_data->domain_id = current->domain->domain_id;
v->arch.vpmu.xenpmu_data->vcpu_id = current->vcpu_id;
@@ -492,15 +526,20 @@ long do_xenpmu_op(int op, XEN_GUEST_HANDLE_PARAM(xen_pmu_params_t) arg)
if ( copy_from_guest(&pmu_params, arg, 1) )
return -EFAULT;
- if ( pmu_params.d.val & ~XENPMU_MODE_ON )
+ if ( (pmu_params.d.val & ~(XENPMU_MODE_ON | XENPMU_MODE_PRIV)) ||
+ ((pmu_params.d.val & XENPMU_MODE_ON) &&
+ (pmu_params.d.val & XENPMU_MODE_PRIV)) )
return -EINVAL;
vpmu_mode = pmu_params.d.val;
- if ( vpmu_mode == XENPMU_MODE_OFF )
+
+ if ( (vpmu_mode == XENPMU_MODE_OFF) || (vpmu_mode & XENPMU_MODE_PRIV) )
/*
* After this VPMU context will never be loaded during context
- * switch. We also prevent PMU MSR accesses (which can load
- * context) when VPMU is disabled.
+ * switch. Because PMU MSR accesses load VPMU context we don't
+ * allow them when VPMU is off and, for non-provileged domains,
+ * when we are in privileged mode. (We do want these accesses to
+ * load VPMU context for control domain in this mode)
*/
vpmu_unload_all();
diff --git a/xen/arch/x86/traps.c b/xen/arch/x86/traps.c
index 442d3fb..83ea479 100644
--- a/xen/arch/x86/traps.c
+++ b/xen/arch/x86/traps.c
@@ -2508,7 +2508,11 @@ static int emulate_privileged_op(struct cpu_user_regs *regs)
case MSR_CORE_PERF_FIXED_CTR_CTRL...MSR_CORE_PERF_GLOBAL_OVF_CTRL:
case MSR_AMD_FAM15H_EVNTSEL0...MSR_AMD_FAM15H_PERFCTR5:
if ( !vpmu_do_wrmsr(regs->ecx, msr_content) )
- goto invalid;
+ {
+ if ( (vpmu_mode & XENPMU_MODE_PRIV) &&
+ is_control_domain(v->domain) )
+ goto invalid;
+ }
break;
default:
if ( wrmsr_hypervisor_regs(regs->ecx, msr_content) == 1 )
diff --git a/xen/include/public/pmu.h b/xen/include/public/pmu.h
index 50f6d6d..e3352a2 100644
--- a/xen/include/public/pmu.h
+++ b/xen/include/public/pmu.h
@@ -56,9 +56,12 @@ DEFINE_XEN_GUEST_HANDLE(xen_pmu_params_t);
* - XENPMU_MODE_OFF: No PMU virtualization
* - XENPMU_MODE_ON: Guests can profile themselves, dom0 profiles
* itself and Xen
+ * - XENPMU_MODE_PRIV: Only dom0 has access to VPMU and it profiles
+ * everyone: itself, the hypervisor and the guests.
*/
#define XENPMU_MODE_OFF 0
#define XENPMU_MODE_ON (1<<0)
+#define XENPMU_MODE_PRIV (1<<1)
/*
* PMU features:
--
1.8.3.1
^ permalink raw reply related [flat|nested] 44+ messages in thread
* [PATCH v5 RESEND 14/17] x86/VPMU: Save VPMU state for PV guests during context switch
2014-04-23 12:50 [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Boris Ostrovsky
` (12 preceding siblings ...)
2014-04-23 12:50 ` [PATCH v5 RESEND 13/17] x86/VPMU: Add privileged PMU mode Boris Ostrovsky
@ 2014-04-23 12:50 ` Boris Ostrovsky
2014-04-26 8:40 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 15/17] x86/VPMU: NMI-based VPMU support Boris Ostrovsky
` (4 subsequent siblings)
18 siblings, 1 reply; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-23 12:50 UTC (permalink / raw)
To: kevin.tian
Cc: keir, jun.nakajima, andrew.cooper3, eddie.dong, donald.d.dugger,
xen-devel, dietmar.hahn, JBeulich, boris.ostrovsky,
suravee.suthikulpanit
Save VPMU state during context switch for both HVM and PV guests unless we
are in PMU privileged mode (i.e. dom0 is doing all profiling).
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
xen/arch/x86/domain.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c
index b389abc..87c3a02 100644
--- a/xen/arch/x86/domain.c
+++ b/xen/arch/x86/domain.c
@@ -1461,16 +1461,14 @@ void context_switch(struct vcpu *prev, struct vcpu *next)
}
if ( prev != next )
- _update_runstate_area(prev);
-
- if ( is_hvm_vcpu(prev) )
{
- if ( (prev != next) && (vpmu_mode & XENPMU_MODE_ON) )
+ _update_runstate_area(prev);
+ if ( vpmu_mode & XENPMU_MODE_ON )
vpmu_save(prev);
+ }
- if ( !list_empty(&prev->arch.hvm_vcpu.tm_list) )
+ if ( is_hvm_vcpu(prev) && !list_empty(&prev->arch.hvm_vcpu.tm_list) )
pt_save_timer(prev);
- }
local_irq_disable();
@@ -1508,7 +1506,7 @@ void context_switch(struct vcpu *prev, struct vcpu *next)
(next->domain->domain_id != 0));
}
- if ( is_hvm_vcpu(next) && (prev != next) && (vpmu_mode & XENPMU_MODE_ON) )
+ if ( (prev != next) && (vpmu_mode & XENPMU_MODE_ON) )
/* Must be done with interrupts enabled */
vpmu_load(next);
--
1.8.3.1
^ permalink raw reply related [flat|nested] 44+ messages in thread
* [PATCH v5 RESEND 15/17] x86/VPMU: NMI-based VPMU support
2014-04-23 12:50 [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Boris Ostrovsky
` (13 preceding siblings ...)
2014-04-23 12:50 ` [PATCH v5 RESEND 14/17] x86/VPMU: Save VPMU state for PV guests during context switch Boris Ostrovsky
@ 2014-04-23 12:50 ` Boris Ostrovsky
2014-04-26 8:48 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 16/17] x86/VPMU: Suport for PVH guests Boris Ostrovsky
` (3 subsequent siblings)
18 siblings, 1 reply; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-23 12:50 UTC (permalink / raw)
To: kevin.tian
Cc: keir, jun.nakajima, andrew.cooper3, eddie.dong, donald.d.dugger,
xen-devel, dietmar.hahn, JBeulich, boris.ostrovsky,
suravee.suthikulpanit
Add support for using NMIs as PMU interrupts.
Most of processing is still performed by vpmu_do_interrupt(). However, since
certain operations are not NMI-safe we defer them to a softint that vpmu_do_interrupt()
will schedule:
* For PV guests that would be send_guest_vcpu_virq()
* For HVM guests it's VLAPIC accesses and hvm_get_segment_register() (the later
can be called in privileged profiling mode when the interrupted guest is an HVM one).
With send_guest_vcpu_virq() and hvm_get_segment_register() for PV(H) and vlapic
accesses for HVM moved to sofint, the only routines/macros that vpmu_do_interrupt()
calls in NMI mode are:
* memcpy()
* querying domain type (is_XX_domain())
* guest_cpu_user_regs()
* XLAT_cpu_user_regs()
* raise_softirq()
* vcpu_vpmu()
* vpmu_ops->arch_vpmu_save()
* vpmu_ops->do_interrupt() (in the future for PVH support)
The latter two only access PMU MSRs with {rd,wr}msrl() (not the _safe versions
which would not be NMI-safe).
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
xen/arch/x86/hvm/svm/vpmu.c | 1 +
xen/arch/x86/hvm/vmx/vpmu_core2.c | 1 +
xen/arch/x86/hvm/vpmu.c | 169 ++++++++++++++++++++++++++++++--------
3 files changed, 138 insertions(+), 33 deletions(-)
diff --git a/xen/arch/x86/hvm/svm/vpmu.c b/xen/arch/x86/hvm/svm/vpmu.c
index 346aa51..04d3b91 100644
--- a/xen/arch/x86/hvm/svm/vpmu.c
+++ b/xen/arch/x86/hvm/svm/vpmu.c
@@ -182,6 +182,7 @@ static inline void context_load(struct vcpu *v)
}
}
+/* Must be NMI-safe */
static void amd_vpmu_load(struct vcpu *v)
{
struct vpmu_struct *vpmu = vcpu_vpmu(v);
diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c b/xen/arch/x86/hvm/vmx/vpmu_core2.c
index 9eac418..e214f01 100644
--- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
+++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
@@ -303,6 +303,7 @@ static inline void __core2_vpmu_save(struct vcpu *v)
rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS, core2_vpmu_cxt->global_status);
}
+/* Must be NMI-safe */
static int core2_vpmu_save(struct vcpu *v)
{
struct vpmu_struct *vpmu = vcpu_vpmu(v);
diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
index dc416f9..cbe8cfd 100644
--- a/xen/arch/x86/hvm/vpmu.c
+++ b/xen/arch/x86/hvm/vpmu.c
@@ -36,6 +36,7 @@
#include <asm/hvm/svm/svm.h>
#include <asm/hvm/svm/vmcb.h>
#include <asm/apic.h>
+#include <asm/nmi.h>
#include <public/pmu.h>
/*
@@ -49,33 +50,57 @@ static void parse_vpmu_param(char *s);
custom_param("vpmu", parse_vpmu_param);
static DEFINE_PER_CPU(struct vcpu *, last_vcpu);
+static DEFINE_PER_CPU(struct vcpu *, sampled_vcpu);
+
+static uint32_t __read_mostly vpmu_interrupt_type = PMU_APIC_VECTOR;
static void __init parse_vpmu_param(char *s)
{
- switch ( parse_bool(s) )
- {
- case 0:
- break;
- default:
- if ( !strcmp(s, "bts") )
- vpmu_features |= XENPMU_FEATURE_INTEL_BTS;
- else if ( *s )
+ char *ss;
+
+ vpmu_mode = XENPMU_MODE_ON;
+ if (*s == '\0')
+ return;
+
+ do {
+ ss = strchr(s, ',');
+ if ( ss )
+ *ss = '\0';
+
+ switch ( parse_bool(s) )
{
- printk("VPMU: unknown flag: %s - vpmu disabled!\n", s);
+ case 0:
+ vpmu_mode = XENPMU_MODE_OFF;
+ return;
+ case -1:
+ if ( !strcmp(s, "nmi") )
+ vpmu_interrupt_type = APIC_DM_NMI;
+ else if ( !strcmp(s, "bts") )
+ vpmu_features |= XENPMU_FEATURE_INTEL_BTS;
+ else if ( !strcmp(s, "priv") )
+ {
+ vpmu_mode &= ~XENPMU_MODE_ON;
+ vpmu_mode |= XENPMU_MODE_PRIV;
+ }
+ else
+ {
+ printk("VPMU: unknown flag: %s - vpmu disabled!\n", s);
+ vpmu_mode = XENPMU_MODE_OFF;
+ return;
+ }
+ default:
break;
}
- /* fall through */
- case 1:
- vpmu_mode = XENPMU_MODE_ON;
- break;
- }
+
+ s = ss + 1;
+ } while ( ss );
}
void vpmu_lvtpc_update(uint32_t val)
{
struct vpmu_struct *vpmu = vcpu_vpmu(current);
- vpmu->hw_lapic_lvtpc = PMU_APIC_VECTOR | (val & APIC_LVT_MASKED);
+ vpmu->hw_lapic_lvtpc = vpmu_interrupt_type | (val & APIC_LVT_MASKED);
/* Postpone APIC updates for PV guests if PMU interrupt is pending */
if ( !is_pv_domain(current->domain) ||
@@ -84,6 +109,27 @@ void vpmu_lvtpc_update(uint32_t val)
apic_write(APIC_LVTPC, vpmu->hw_lapic_lvtpc);
}
+static void vpmu_send_nmi(struct vcpu *v)
+{
+ struct vlapic *vlapic;
+ u32 vlapic_lvtpc;
+ unsigned char int_vec;
+
+ ASSERT( is_hvm_vcpu(v) );
+
+ vlapic = vcpu_vlapic(v);
+ if ( !is_vlapic_lvtpc_enabled(vlapic) )
+ return;
+
+ vlapic_lvtpc = vlapic_get_reg(vlapic, APIC_LVTPC);
+ int_vec = vlapic_lvtpc & APIC_VECTOR_MASK;
+
+ if ( GET_APIC_DELIVERY_MODE(vlapic_lvtpc) == APIC_MODE_FIXED )
+ vlapic_set_irq(vcpu_vlapic(v), int_vec, 0);
+ else
+ v->nmi_pending = 1;
+}
+
int vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
{
struct vpmu_struct *vpmu = vcpu_vpmu(current);
@@ -137,6 +183,7 @@ int vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content)
return 0;
}
+/* This routine may be called in NMI context */
int vpmu_do_interrupt(struct cpu_user_regs *regs)
{
struct vcpu *v = current;
@@ -217,9 +264,13 @@ int vpmu_do_interrupt(struct cpu_user_regs *regs)
memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
gregs, sizeof(struct cpu_user_regs));
- hvm_get_segment_register(current, x86_seg_cs, &cs);
- gregs = &v->arch.vpmu.xenpmu_data->pmu.r.regs;
- gregs->cs = cs.attr.fields.dpl;
+ /* This is unsafe in NMI context, we'll do it in softint handler */
+ if ( !(vpmu_interrupt_type & APIC_DM_NMI ) )
+ {
+ hvm_get_segment_register(current, x86_seg_cs, &cs);
+ gregs = &v->arch.vpmu.xenpmu_data->pmu.r.regs;
+ gregs->cs = cs.attr.fields.dpl;
+ }
}
v->arch.vpmu.xenpmu_data->domain_id = current->domain->domain_id;
@@ -230,30 +281,30 @@ int vpmu_do_interrupt(struct cpu_user_regs *regs)
apic_write(APIC_LVTPC, vpmu->hw_lapic_lvtpc | APIC_LVT_MASKED);
vpmu->hw_lapic_lvtpc |= APIC_LVT_MASKED;
- send_guest_vcpu_virq(v, VIRQ_XENPMU);
+ if ( vpmu_interrupt_type & APIC_DM_NMI )
+ {
+ per_cpu(sampled_vcpu, smp_processor_id()) = current;
+ raise_softirq(PMU_SOFTIRQ);
+ }
+ else
+ send_guest_vcpu_virq(v, VIRQ_XENPMU);
return 1;
}
if ( vpmu->arch_vpmu_ops )
{
- struct vlapic *vlapic = vcpu_vlapic(v);
- u32 vlapic_lvtpc;
- unsigned char int_vec;
-
if ( !vpmu->arch_vpmu_ops->do_interrupt(regs) )
return 0;
- if ( !is_vlapic_lvtpc_enabled(vlapic) )
- return 1;
-
- vlapic_lvtpc = vlapic_get_reg(vlapic, APIC_LVTPC);
- int_vec = vlapic_lvtpc & APIC_VECTOR_MASK;
-
- if ( GET_APIC_DELIVERY_MODE(vlapic_lvtpc) == APIC_MODE_FIXED )
- vlapic_set_irq(vcpu_vlapic(v), int_vec, 0);
+ if ( vpmu_interrupt_type & APIC_DM_NMI )
+ {
+ per_cpu(sampled_vcpu, smp_processor_id()) = current;
+ raise_softirq(PMU_SOFTIRQ);
+ }
else
- v->nmi_pending = 1;
+ vpmu_send_nmi(v);
+
return 1;
}
@@ -301,7 +352,7 @@ void vpmu_save(struct vcpu *v)
if ( vpmu->arch_vpmu_ops->arch_vpmu_save(v) )
vpmu_reset(vpmu, VPMU_CONTEXT_LOADED);
- apic_write(APIC_LVTPC, PMU_APIC_VECTOR | APIC_LVT_MASKED);
+ apic_write(APIC_LVTPC, vpmu_interrupt_type | APIC_LVT_MASKED);
}
void vpmu_load(struct vcpu *v)
@@ -450,11 +501,48 @@ static void vpmu_unload_all(void)
}
}
+/* Process the softirq set by PMU NMI handler */
+static void pmu_softnmi(void)
+{
+ struct cpu_user_regs *regs;
+ struct vcpu *v, *sampled = per_cpu(sampled_vcpu, smp_processor_id());
+
+ if ( (vpmu_mode & XENPMU_MODE_PRIV) ||
+ (sampled->domain->domain_id >= DOMID_FIRST_RESERVED) )
+ v = dom0->vcpu[smp_processor_id() % dom0->max_vcpus];
+ else
+ {
+ if ( is_hvm_domain(sampled->domain) )
+ {
+ vpmu_send_nmi(sampled);
+ return;
+ }
+ v = sampled;
+ }
+
+ regs = &v->arch.vpmu.xenpmu_data->pmu.r.regs;
+ if ( !is_pv_domain(sampled->domain) )
+ {
+ struct segment_register cs;
+
+ hvm_get_segment_register(sampled, x86_seg_cs, &cs);
+ regs->cs = cs.attr.fields.dpl;
+ }
+
+ send_guest_vcpu_virq(v, VIRQ_XENPMU);
+}
+
+int pmu_nmi_interrupt(struct cpu_user_regs *regs, int cpu)
+{
+ return vpmu_do_interrupt(regs);
+}
+
static int pvpmu_init(struct domain *d, xen_pmu_params_t *params)
{
struct vcpu *v;
struct page_info *page;
uint64_t gfn = params->d.val;
+ static bool_t __read_mostly pvpmu_initted = 0;
if ( !is_pv_domain(d) )
return -EINVAL;
@@ -480,6 +568,21 @@ static int pvpmu_init(struct domain *d, xen_pmu_params_t *params)
return -EINVAL;
}
+ if ( !pvpmu_initted )
+ {
+ if (reserve_lapic_nmi() == 0)
+ set_nmi_callback(pmu_nmi_interrupt);
+ else
+ {
+ printk("Failed to reserve PMU NMI\n");
+ put_page(page);
+ return -EBUSY;
+ }
+ open_softirq(PMU_SOFTIRQ, pmu_softnmi);
+
+ pvpmu_initted = 1;
+ }
+
vpmu_initialise(v);
return 0;
--
1.8.3.1
^ permalink raw reply related [flat|nested] 44+ messages in thread
* [PATCH v5 RESEND 16/17] x86/VPMU: Suport for PVH guests
2014-04-23 12:50 [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Boris Ostrovsky
` (14 preceding siblings ...)
2014-04-23 12:50 ` [PATCH v5 RESEND 15/17] x86/VPMU: NMI-based VPMU support Boris Ostrovsky
@ 2014-04-23 12:50 ` Boris Ostrovsky
2014-04-26 8:50 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 17/17] x86/VPMU: Move VPMU files up from hvm/ directory Boris Ostrovsky
` (2 subsequent siblings)
18 siblings, 1 reply; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-23 12:50 UTC (permalink / raw)
To: kevin.tian
Cc: keir, jun.nakajima, andrew.cooper3, eddie.dong, donald.d.dugger,
xen-devel, dietmar.hahn, JBeulich, boris.ostrovsky,
suravee.suthikulpanit
Add support for PVH guests. Most of operations are performed as in an HVM guest.
However, interrupt management is done in PV-like manner.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
xen/arch/x86/hvm/hvm.c | 3 ++-
xen/arch/x86/hvm/svm/vpmu.c | 13 +++++++------
xen/arch/x86/hvm/vmx/vpmu_core2.c | 24 ++++++++++++------------
xen/arch/x86/hvm/vpmu.c | 34 ++++++++++++++++++++++------------
4 files changed, 43 insertions(+), 31 deletions(-)
diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 69f7e74..1e50c35 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -3451,7 +3451,8 @@ static hvm_hypercall_t *const pvh_hypercall64_table[NR_hypercalls] = {
[ __HYPERVISOR_physdev_op ] = (hvm_hypercall_t *)hvm_physdev_op,
HYPERCALL(hvm_op),
HYPERCALL(sysctl),
- HYPERCALL(domctl)
+ HYPERCALL(domctl),
+ HYPERCALL(xenpmu_op)
};
int hvm_do_hypercall(struct cpu_user_regs *regs)
diff --git a/xen/arch/x86/hvm/svm/vpmu.c b/xen/arch/x86/hvm/svm/vpmu.c
index 04d3b91..0e5dac4 100644
--- a/xen/arch/x86/hvm/svm/vpmu.c
+++ b/xen/arch/x86/hvm/svm/vpmu.c
@@ -162,6 +162,7 @@ static void amd_vpmu_unset_msr_bitmap(struct vcpu *v)
ctxt->msr_bitmap_set = 0;
}
+/* Must be NMI-safe */
static int amd_vpmu_do_interrupt(struct cpu_user_regs *regs)
{
return 1;
@@ -243,7 +244,7 @@ static int amd_vpmu_save(struct vcpu *v)
context_save(v);
- if ( is_hvm_domain(v->domain) &&
+ if ( has_hvm_container_domain(v->domain) &&
!vpmu_is_set(vpmu, VPMU_RUNNING) && ctx->msr_bitmap_set )
amd_vpmu_unset_msr_bitmap(v);
@@ -286,7 +287,7 @@ static int amd_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
struct vpmu_struct *vpmu = vcpu_vpmu(v);
/* For all counters, enable guest only mode for HVM guest */
- if ( is_hvm_domain(v->domain) && (get_pmu_reg_type(msr) == MSR_TYPE_CTRL) &&
+ if ( has_hvm_container_domain(v->domain) && (get_pmu_reg_type(msr) == MSR_TYPE_CTRL) &&
!(is_guest_mode(msr_content)) )
{
set_guest_mode(msr_content);
@@ -300,7 +301,7 @@ static int amd_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
return 1;
vpmu_set(vpmu, VPMU_RUNNING);
- if ( is_hvm_domain(v->domain) &&
+ if ( has_hvm_container_domain(v->domain) &&
!((struct xen_pmu_amd_ctxt *)vpmu->context)->msr_bitmap_set )
amd_vpmu_set_msr_bitmap(v);
}
@@ -310,7 +311,7 @@ static int amd_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
(is_pmu_enabled(msr_content) == 0) && vpmu_is_set(vpmu, VPMU_RUNNING) )
{
vpmu_reset(vpmu, VPMU_RUNNING);
- if ( is_hvm_domain(v->domain) &&
+ if ( has_hvm_container_domain(v->domain) &&
((struct xen_pmu_amd_ctxt *)vpmu->context)->msr_bitmap_set )
amd_vpmu_unset_msr_bitmap(v);
release_pmu_ownship(PMU_OWNER_HVM);
@@ -382,7 +383,7 @@ static int amd_vpmu_initialise(struct vcpu *v)
}
}
- if ( !is_pv_domain(v->domain) )
+ if ( has_hvm_container_domain(v->domain) )
{
ctxt = xzalloc_bytes(sizeof(struct xen_pmu_amd_ctxt) +
sizeof(uint64_t) * AMD_MAX_COUNTERS +
@@ -413,7 +414,7 @@ static void amd_vpmu_destroy(struct vcpu *v)
if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
return;
- if ( is_hvm_domain(v->domain) )
+ if ( has_hvm_container_domain(v->domain) )
{
if ( ((struct xen_pmu_amd_ctxt *)vpmu->context)->msr_bitmap_set )
amd_vpmu_unset_msr_bitmap(v);
diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c b/xen/arch/x86/hvm/vmx/vpmu_core2.c
index e214f01..5a07817 100644
--- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
+++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
@@ -299,7 +299,7 @@ static inline void __core2_vpmu_save(struct vcpu *v)
for ( i = 0; i < arch_pmc_cnt; i++ )
rdmsrl(MSR_IA32_PERFCTR0 + i, xen_pmu_cntr_pair[i].counter);
- if ( is_pv_domain(v->domain) )
+ if ( !has_hvm_container_domain(v->domain) )
rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS, core2_vpmu_cxt->global_status);
}
@@ -308,7 +308,7 @@ static int core2_vpmu_save(struct vcpu *v)
{
struct vpmu_struct *vpmu = vcpu_vpmu(v);
- if ( is_pv_domain(v->domain) )
+ if ( !has_hvm_container_domain(v->domain) )
wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0);
if ( !vpmu_is_set_all(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED) )
@@ -318,7 +318,7 @@ static int core2_vpmu_save(struct vcpu *v)
/* Unset PMU MSR bitmap to trap lazy load. */
if ( !vpmu_is_set(vpmu, VPMU_RUNNING) && cpu_has_vmx_msr_bitmap
- && !is_pv_domain(v->domain) )
+ && has_hvm_container_domain(v->domain) )
core2_vpmu_unset_msr_bitmap(v->arch.hvm_vmx.msr_bitmap);
return 1;
@@ -349,7 +349,7 @@ static inline void __core2_vpmu_load(struct vcpu *v)
wrmsrl(MSR_IA32_DS_AREA, core2_vpmu_cxt->ds_area);
wrmsrl(MSR_IA32_PEBS_ENABLE, core2_vpmu_cxt->pebs_enable);
- if ( is_pv_domain(v->domain) )
+ if ( !has_hvm_container_domain(v->domain) )
{
wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, core2_vpmu_cxt->global_ovf_ctrl);
core2_vpmu_cxt->global_ovf_ctrl = 0;
@@ -436,7 +436,7 @@ static int core2_vpmu_msr_common_check(u32 msr_index, int *type, int *index)
{
__core2_vpmu_load(current);
vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
- if ( cpu_has_vmx_msr_bitmap && is_hvm_domain(current->domain) )
+ if ( cpu_has_vmx_msr_bitmap && has_hvm_container_domain(current->domain) )
core2_vpmu_set_msr_bitmap(current->arch.hvm_vmx.msr_bitmap);
}
return 1;
@@ -444,7 +444,7 @@ static int core2_vpmu_msr_common_check(u32 msr_index, int *type, int *index)
static void inject_trap(struct vcpu *v, unsigned int trapno)
{
- if ( !is_pv_domain(v->domain) )
+ if ( has_hvm_container_domain(v->domain) )
hvm_inject_hw_exception(trapno, 0);
else
send_guest_trap(v->domain, v->vcpu_id, trapno);
@@ -538,7 +538,7 @@ static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
break;
case MSR_CORE_PERF_FIXED_CTR_CTRL:
non_global_ctrl = msr_content;
- if ( !is_pv_domain(v->domain) )
+ if ( has_hvm_container_domain(v->domain) )
vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, &global_ctrl);
else
rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, global_ctrl);
@@ -558,7 +558,7 @@ static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
struct xen_pmu_cntr_pair *xen_pmu_cntr_pair =
vpmu_reg_pointer(core2_vpmu_cxt, arch_counters);
- if ( !is_pv_domain(v->domain) )
+ if ( has_hvm_container_domain(v->domain) )
vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, &global_ctrl);
else
rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, global_ctrl);
@@ -608,7 +608,7 @@ static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
}
else
{
- if ( !is_pv_domain(v->domain) )
+ if ( has_hvm_container_domain(v->domain) )
vmx_write_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, msr_content);
else
wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, msr_content);
@@ -636,7 +636,7 @@ static int core2_vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content)
*msr_content = core2_vpmu_cxt->global_status;
break;
case MSR_CORE_PERF_GLOBAL_CTRL:
- if ( !is_pv_domain(v->domain) )
+ if ( has_hvm_container_domain(v->domain) )
vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, msr_content);
else
rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, *msr_content);
@@ -803,7 +803,7 @@ func_out:
check_pmc_quirk();
/* PV domains can allocate resources immediately */
- if ( is_pv_domain(v->domain) && !core2_vpmu_alloc_resource(v) )
+ if ( !has_hvm_container_domain(v->domain) && !core2_vpmu_alloc_resource(v) )
return 1;
return 0;
@@ -816,7 +816,7 @@ static void core2_vpmu_destroy(struct vcpu *v)
if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
return;
- if ( is_hvm_domain(v->domain) )
+ if ( has_hvm_container_domain(v->domain) )
{
xfree(vpmu->context);
if ( cpu_has_vmx_msr_bitmap )
diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
index cbe8cfd..3645e4c 100644
--- a/xen/arch/x86/hvm/vpmu.c
+++ b/xen/arch/x86/hvm/vpmu.c
@@ -103,7 +103,7 @@ void vpmu_lvtpc_update(uint32_t val)
vpmu->hw_lapic_lvtpc = vpmu_interrupt_type | (val & APIC_LVT_MASKED);
/* Postpone APIC updates for PV guests if PMU interrupt is pending */
- if ( !is_pv_domain(current->domain) ||
+ if ( !has_hvm_container_domain(current->domain) ||
!(current->arch.vpmu.xenpmu_data &&
current->arch.vpmu.xenpmu_data->pmu_flags & PMU_CACHED) )
apic_write(APIC_LVTPC, vpmu->hw_lapic_lvtpc);
@@ -147,7 +147,7 @@ int vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
* and since do_wrmsr may load VPMU context we should save
* (and unload) it again.
*/
- if ( !is_hvm_domain(current->domain) &&
+ if ( !has_hvm_container_domain(current->domain) &&
(current->arch.vpmu.xenpmu_data->pmu_flags & PMU_CACHED) )
{
vpmu_set(vpmu, VPMU_CONTEXT_SAVE);
@@ -171,7 +171,7 @@ int vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content)
{
int ret = vpmu->arch_vpmu_ops->do_rdmsr(msr, msr_content);
- if ( !is_hvm_domain(current->domain) &&
+ if ( !has_hvm_container_domain(current->domain) &&
(current->arch.vpmu.xenpmu_data->pmu_flags & PMU_CACHED) )
{
vpmu_set(vpmu, VPMU_CONTEXT_SAVE);
@@ -200,13 +200,17 @@ int vpmu_do_interrupt(struct cpu_user_regs *regs)
if ( !is_hvm_domain(v->domain) || (vpmu_mode & XENPMU_MODE_PRIV) )
{
- /* PV guest or dom0 is doing system profiling */
+ /* PV(H) guest or dom0 is doing system profiling */
struct cpu_user_regs *gregs;
int err;
if ( v->arch.vpmu.xenpmu_data->pmu_flags & PMU_CACHED )
return 1;
+ if ( is_pvh_domain(current->domain) && !(vpmu_mode & XENPMU_MODE_PRIV) &&
+ !vpmu->arch_vpmu_ops->do_interrupt(regs) )
+ return 0;
+
/* PV guest will be reading PMU MSRs from xenpmu_data */
vpmu_set(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED);
err = vpmu->arch_vpmu_ops->arch_vpmu_save(v);
@@ -243,7 +247,7 @@ int vpmu_do_interrupt(struct cpu_user_regs *regs)
else if ( !is_control_domain(current->domain) &&
!is_idle_vcpu(current) )
{
- /* PV guest */
+ /* PV(H) guest */
gregs = guest_cpu_user_regs();
memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
gregs, sizeof(struct cpu_user_regs));
@@ -253,7 +257,15 @@ int vpmu_do_interrupt(struct cpu_user_regs *regs)
regs, sizeof(struct cpu_user_regs));
gregs = &v->arch.vpmu.xenpmu_data->pmu.r.regs;
- gregs->cs = (current->arch.flags & TF_kernel_mode) ? 0 : 0x3;
+ if ( !is_pvh_domain(current->domain) )
+ gregs->cs = (current->arch.flags & TF_kernel_mode) ? 0 : 0x3;
+ else if ( !(vpmu_interrupt_type & APIC_DM_NMI) )
+ {
+ struct segment_register seg_cs;
+
+ hvm_get_segment_register(current, x86_seg_cs, &seg_cs);
+ gregs->cs = seg_cs.attr.fields.dpl;
+ }
}
else
{
@@ -277,7 +289,8 @@ int vpmu_do_interrupt(struct cpu_user_regs *regs)
v->arch.vpmu.xenpmu_data->vcpu_id = current->vcpu_id;
v->arch.vpmu.xenpmu_data->pcpu_id = smp_processor_id();
- v->arch.vpmu.xenpmu_data->pmu_flags |= PMU_CACHED;
+ if ( !is_pvh_domain(current->domain) || (vpmu_mode & XENPMU_MODE_PRIV) )
+ v->arch.vpmu.xenpmu_data->pmu_flags |= PMU_CACHED;
apic_write(APIC_LVTPC, vpmu->hw_lapic_lvtpc | APIC_LVT_MASKED);
vpmu->hw_lapic_lvtpc |= APIC_LVT_MASKED;
@@ -404,7 +417,7 @@ void vpmu_load(struct vcpu *v)
/* Only when PMU is counting, we load PMU context immediately. */
if ( !vpmu_is_set(vpmu, VPMU_RUNNING) ||
- (is_pv_domain(v->domain) && vpmu->xenpmu_data->pmu_flags & PMU_CACHED) )
+ (!has_hvm_container_domain(v->domain) && vpmu->xenpmu_data->pmu_flags & PMU_CACHED) )
return;
if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->arch_vpmu_load )
@@ -521,7 +534,7 @@ static void pmu_softnmi(void)
}
regs = &v->arch.vpmu.xenpmu_data->pmu.r.regs;
- if ( !is_pv_domain(sampled->domain) )
+ if ( has_hvm_container_domain(sampled->domain) )
{
struct segment_register cs;
@@ -544,9 +557,6 @@ static int pvpmu_init(struct domain *d, xen_pmu_params_t *params)
uint64_t gfn = params->d.val;
static bool_t __read_mostly pvpmu_initted = 0;
- if ( !is_pv_domain(d) )
- return -EINVAL;
-
if ( params->vcpu < 0 || params->vcpu >= d->max_vcpus )
return -EINVAL;
--
1.8.3.1
^ permalink raw reply related [flat|nested] 44+ messages in thread
* [PATCH v5 RESEND 17/17] x86/VPMU: Move VPMU files up from hvm/ directory
2014-04-23 12:50 [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Boris Ostrovsky
` (15 preceding siblings ...)
2014-04-23 12:50 ` [PATCH v5 RESEND 16/17] x86/VPMU: Suport for PVH guests Boris Ostrovsky
@ 2014-04-23 12:50 ` Boris Ostrovsky
2014-04-26 8:52 ` Tian, Kevin
2014-04-24 9:22 ` [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Tian, Kevin
2014-04-26 8:55 ` Tian, Kevin
18 siblings, 1 reply; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-23 12:50 UTC (permalink / raw)
To: kevin.tian
Cc: keir, jun.nakajima, andrew.cooper3, eddie.dong, donald.d.dugger,
xen-devel, dietmar.hahn, JBeulich, boris.ostrovsky,
suravee.suthikulpanit
Since PMU is now not HVM specific we can move VPMU-related files up from
arch/x86/hvm/ directory.
Specifically:
arch/x86/hvm/vpmu.c -> arch/x86/vpmu.c
arch/x86/hvm/svm/vpmu.c -> arch/x86/vpmu_amd.c
arch/x86/hvm/vmx/vpmu_core2.c -> arch/x86/vpmu_intel.c
include/asm-x86/hvm/vpmu.h -> include/asm-x86/vpmu.h
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
xen/arch/x86/Makefile | 1 +
xen/arch/x86/hvm/Makefile | 1 -
xen/arch/x86/hvm/svm/Makefile | 1 -
xen/arch/x86/hvm/svm/vpmu.c | 509 ------------------
xen/arch/x86/hvm/vlapic.c | 2 +-
xen/arch/x86/hvm/vmx/Makefile | 1 -
xen/arch/x86/hvm/vmx/vpmu_core2.c | 940 ----------------------------------
xen/arch/x86/hvm/vpmu.c | 720 --------------------------
xen/arch/x86/oprofile/op_model_ppro.c | 2 +-
xen/arch/x86/traps.c | 2 +-
xen/arch/x86/vpmu.c | 720 ++++++++++++++++++++++++++
xen/arch/x86/vpmu_amd.c | 509 ++++++++++++++++++
xen/arch/x86/vpmu_intel.c | 940 ++++++++++++++++++++++++++++++++++
xen/include/asm-x86/hvm/vmx/vmcs.h | 2 +-
xen/include/asm-x86/hvm/vpmu.h | 99 ----
xen/include/asm-x86/vpmu.h | 99 ++++
16 files changed, 2273 insertions(+), 2275 deletions(-)
delete mode 100644 xen/arch/x86/hvm/svm/vpmu.c
delete mode 100644 xen/arch/x86/hvm/vmx/vpmu_core2.c
delete mode 100644 xen/arch/x86/hvm/vpmu.c
create mode 100644 xen/arch/x86/vpmu.c
create mode 100644 xen/arch/x86/vpmu_amd.c
create mode 100644 xen/arch/x86/vpmu_intel.c
delete mode 100644 xen/include/asm-x86/hvm/vpmu.h
create mode 100644 xen/include/asm-x86/vpmu.h
diff --git a/xen/arch/x86/Makefile b/xen/arch/x86/Makefile
index d502bdf..cf85dda 100644
--- a/xen/arch/x86/Makefile
+++ b/xen/arch/x86/Makefile
@@ -58,6 +58,7 @@ obj-y += crash.o
obj-y += tboot.o
obj-y += hpet.o
obj-y += xstate.o
+obj-y += vpmu.o vpmu_amd.o vpmu_intel.o
obj-$(crash_debug) += gdbstub.o
diff --git a/xen/arch/x86/hvm/Makefile b/xen/arch/x86/hvm/Makefile
index eea5555..742b83b 100644
--- a/xen/arch/x86/hvm/Makefile
+++ b/xen/arch/x86/hvm/Makefile
@@ -22,4 +22,3 @@ obj-y += vlapic.o
obj-y += vmsi.o
obj-y += vpic.o
obj-y += vpt.o
-obj-y += vpmu.o
\ No newline at end of file
diff --git a/xen/arch/x86/hvm/svm/Makefile b/xen/arch/x86/hvm/svm/Makefile
index a10a55e..760d295 100644
--- a/xen/arch/x86/hvm/svm/Makefile
+++ b/xen/arch/x86/hvm/svm/Makefile
@@ -6,4 +6,3 @@ obj-y += nestedsvm.o
obj-y += svm.o
obj-y += svmdebug.o
obj-y += vmcb.o
-obj-y += vpmu.o
diff --git a/xen/arch/x86/hvm/svm/vpmu.c b/xen/arch/x86/hvm/svm/vpmu.c
deleted file mode 100644
index 0e5dac4..0000000
--- a/xen/arch/x86/hvm/svm/vpmu.c
+++ /dev/null
@@ -1,509 +0,0 @@
-/*
- * vpmu.c: PMU virtualization for HVM domain.
- *
- * Copyright (c) 2010, Advanced Micro Devices, Inc.
- * Parts of this code are Copyright (c) 2007, Intel Corporation
- *
- * Author: Wei Wang <wei.wang2@amd.com>
- * Tested by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307 USA.
- *
- */
-
-#include <xen/config.h>
-#include <xen/xenoprof.h>
-#include <xen/hvm/save.h>
-#include <xen/sched.h>
-#include <xen/irq.h>
-#include <asm/apic.h>
-#include <asm/hvm/vlapic.h>
-#include <asm/hvm/vpmu.h>
-#include <public/pmu.h>
-
-#define MSR_F10H_EVNTSEL_GO_SHIFT 40
-#define MSR_F10H_EVNTSEL_EN_SHIFT 22
-#define MSR_F10H_COUNTER_LENGTH 48
-
-#define is_guest_mode(msr) ((msr) & (1ULL << MSR_F10H_EVNTSEL_GO_SHIFT))
-#define is_pmu_enabled(msr) ((msr) & (1ULL << MSR_F10H_EVNTSEL_EN_SHIFT))
-#define set_guest_mode(msr) (msr |= (1ULL << MSR_F10H_EVNTSEL_GO_SHIFT))
-#define is_overflowed(msr) (!((msr) & (1ULL << (MSR_F10H_COUNTER_LENGTH-1))))
-
-static unsigned int __read_mostly num_counters;
-static const u32 __read_mostly *counters;
-static const u32 __read_mostly *ctrls;
-static bool_t __read_mostly k7_counters_mirrored;
-
-#define F10H_NUM_COUNTERS 4
-#define F15H_NUM_COUNTERS 6
-#define AMD_MAX_COUNTERS 6
-
-/* PMU Counter MSRs. */
-static const u32 AMD_F10H_COUNTERS[] = {
- MSR_K7_PERFCTR0,
- MSR_K7_PERFCTR1,
- MSR_K7_PERFCTR2,
- MSR_K7_PERFCTR3
-};
-
-/* PMU Control MSRs. */
-static const u32 AMD_F10H_CTRLS[] = {
- MSR_K7_EVNTSEL0,
- MSR_K7_EVNTSEL1,
- MSR_K7_EVNTSEL2,
- MSR_K7_EVNTSEL3
-};
-
-static const u32 AMD_F15H_COUNTERS[] = {
- MSR_AMD_FAM15H_PERFCTR0,
- MSR_AMD_FAM15H_PERFCTR1,
- MSR_AMD_FAM15H_PERFCTR2,
- MSR_AMD_FAM15H_PERFCTR3,
- MSR_AMD_FAM15H_PERFCTR4,
- MSR_AMD_FAM15H_PERFCTR5
-};
-
-static const u32 AMD_F15H_CTRLS[] = {
- MSR_AMD_FAM15H_EVNTSEL0,
- MSR_AMD_FAM15H_EVNTSEL1,
- MSR_AMD_FAM15H_EVNTSEL2,
- MSR_AMD_FAM15H_EVNTSEL3,
- MSR_AMD_FAM15H_EVNTSEL4,
- MSR_AMD_FAM15H_EVNTSEL5
-};
-
-static inline int get_pmu_reg_type(u32 addr)
-{
- if ( (addr >= MSR_K7_EVNTSEL0) && (addr <= MSR_K7_EVNTSEL3) )
- return MSR_TYPE_CTRL;
-
- if ( (addr >= MSR_K7_PERFCTR0) && (addr <= MSR_K7_PERFCTR3) )
- return MSR_TYPE_COUNTER;
-
- if ( (addr >= MSR_AMD_FAM15H_EVNTSEL0) &&
- (addr <= MSR_AMD_FAM15H_PERFCTR5 ) )
- {
- if (addr & 1)
- return MSR_TYPE_COUNTER;
- else
- return MSR_TYPE_CTRL;
- }
-
- /* unsupported registers */
- return -1;
-}
-
-static inline u32 get_fam15h_addr(u32 addr)
-{
- switch ( addr )
- {
- case MSR_K7_PERFCTR0:
- return MSR_AMD_FAM15H_PERFCTR0;
- case MSR_K7_PERFCTR1:
- return MSR_AMD_FAM15H_PERFCTR1;
- case MSR_K7_PERFCTR2:
- return MSR_AMD_FAM15H_PERFCTR2;
- case MSR_K7_PERFCTR3:
- return MSR_AMD_FAM15H_PERFCTR3;
- case MSR_K7_EVNTSEL0:
- return MSR_AMD_FAM15H_EVNTSEL0;
- case MSR_K7_EVNTSEL1:
- return MSR_AMD_FAM15H_EVNTSEL1;
- case MSR_K7_EVNTSEL2:
- return MSR_AMD_FAM15H_EVNTSEL2;
- case MSR_K7_EVNTSEL3:
- return MSR_AMD_FAM15H_EVNTSEL3;
- default:
- break;
- }
-
- return addr;
-}
-
-static void amd_vpmu_set_msr_bitmap(struct vcpu *v)
-{
- unsigned int i;
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct xen_pmu_amd_ctxt *ctxt = vpmu->context;
-
- for ( i = 0; i < num_counters; i++ )
- {
- svm_intercept_msr(v, counters[i], MSR_INTERCEPT_NONE);
- svm_intercept_msr(v, ctrls[i], MSR_INTERCEPT_WRITE);
- }
-
- ctxt->msr_bitmap_set = 1;
-}
-
-static void amd_vpmu_unset_msr_bitmap(struct vcpu *v)
-{
- unsigned int i;
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct xen_pmu_amd_ctxt *ctxt = vpmu->context;
-
- for ( i = 0; i < num_counters; i++ )
- {
- svm_intercept_msr(v, counters[i], MSR_INTERCEPT_RW);
- svm_intercept_msr(v, ctrls[i], MSR_INTERCEPT_RW);
- }
-
- ctxt->msr_bitmap_set = 0;
-}
-
-/* Must be NMI-safe */
-static int amd_vpmu_do_interrupt(struct cpu_user_regs *regs)
-{
- return 1;
-}
-
-static inline void context_load(struct vcpu *v)
-{
- unsigned int i;
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct xen_pmu_amd_ctxt *ctxt = vpmu->context;
- uint64_t *counter_regs = vpmu_reg_pointer(ctxt, counters);
- uint64_t *ctrl_regs = vpmu_reg_pointer(ctxt, ctrls);
-
- for ( i = 0; i < num_counters; i++ )
- {
- wrmsrl(counters[i], counter_regs[i]);
- wrmsrl(ctrls[i], ctrl_regs[i]);
- }
-}
-
-/* Must be NMI-safe */
-static void amd_vpmu_load(struct vcpu *v)
-{
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct xen_pmu_amd_ctxt *ctxt = vpmu->context;
- uint64_t *ctrl_regs = vpmu_reg_pointer(ctxt, ctrls);
-
- vpmu_reset(vpmu, VPMU_FROZEN);
-
- if ( vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
- {
- unsigned int i;
-
- for ( i = 0; i < num_counters; i++ )
- wrmsrl(ctrls[i], ctrl_regs[i]);
-
- return;
- }
-
- vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
-
- context_load(v);
-}
-
-static inline void context_save(struct vcpu *v)
-{
- unsigned int i;
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct xen_pmu_amd_ctxt *ctxt = vpmu->context;
- uint64_t *counter_regs = vpmu_reg_pointer(ctxt, counters);
-
- /* No need to save controls -- they are saved in amd_vpmu_do_wrmsr */
- for ( i = 0; i < num_counters; i++ )
- rdmsrl(counters[i], counter_regs[i]);
-}
-
-static int amd_vpmu_save(struct vcpu *v)
-{
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct xen_pmu_amd_ctxt *ctx = vpmu->context;
- unsigned int i;
-
- /*
- * Stop the counters. If we came here via vpmu_save_force (i.e.
- * when VPMU_CONTEXT_SAVE is set) counters are already stopped.
- */
- if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_SAVE) )
- {
- vpmu_set(vpmu, VPMU_FROZEN);
-
- for ( i = 0; i < num_counters; i++ )
- wrmsrl(ctrls[i], 0);
-
- return 0;
- }
-
- if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
- return 0;
-
- context_save(v);
-
- if ( has_hvm_container_domain(v->domain) &&
- !vpmu_is_set(vpmu, VPMU_RUNNING) && ctx->msr_bitmap_set )
- amd_vpmu_unset_msr_bitmap(v);
-
- return 1;
-}
-
-static void context_update(unsigned int msr, u64 msr_content)
-{
- unsigned int i;
- struct vcpu *v = current;
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct xen_pmu_amd_ctxt *ctxt = vpmu->context;
- uint64_t *counter_regs = vpmu_reg_pointer(ctxt, counters);
- uint64_t *ctrl_regs = vpmu_reg_pointer(ctxt, ctrls);
-
- if ( k7_counters_mirrored &&
- ((msr >= MSR_K7_EVNTSEL0) && (msr <= MSR_K7_PERFCTR3)) )
- {
- msr = get_fam15h_addr(msr);
- }
-
- for ( i = 0; i < num_counters; i++ )
- {
- if ( msr == ctrls[i] )
- {
- ctrl_regs[i] = msr_content;
- return;
- }
- else if (msr == counters[i] )
- {
- counter_regs[i] = msr_content;
- return;
- }
- }
-}
-
-static int amd_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
-{
- struct vcpu *v = current;
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
-
- /* For all counters, enable guest only mode for HVM guest */
- if ( has_hvm_container_domain(v->domain) && (get_pmu_reg_type(msr) == MSR_TYPE_CTRL) &&
- !(is_guest_mode(msr_content)) )
- {
- set_guest_mode(msr_content);
- }
-
- /* check if the first counter is enabled */
- if ( (get_pmu_reg_type(msr) == MSR_TYPE_CTRL) &&
- is_pmu_enabled(msr_content) && !vpmu_is_set(vpmu, VPMU_RUNNING) )
- {
- if ( !acquire_pmu_ownership(PMU_OWNER_HVM) )
- return 1;
- vpmu_set(vpmu, VPMU_RUNNING);
-
- if ( has_hvm_container_domain(v->domain) &&
- !((struct xen_pmu_amd_ctxt *)vpmu->context)->msr_bitmap_set )
- amd_vpmu_set_msr_bitmap(v);
- }
-
- /* stop saving & restore if guest stops first counter */
- if ( (get_pmu_reg_type(msr) == MSR_TYPE_CTRL) &&
- (is_pmu_enabled(msr_content) == 0) && vpmu_is_set(vpmu, VPMU_RUNNING) )
- {
- vpmu_reset(vpmu, VPMU_RUNNING);
- if ( has_hvm_container_domain(v->domain) &&
- ((struct xen_pmu_amd_ctxt *)vpmu->context)->msr_bitmap_set )
- amd_vpmu_unset_msr_bitmap(v);
- release_pmu_ownship(PMU_OWNER_HVM);
- }
-
- if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED)
- || vpmu_is_set(vpmu, VPMU_FROZEN) )
- {
- context_load(v);
- vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
- vpmu_reset(vpmu, VPMU_FROZEN);
- }
-
- /* Update vpmu context immediately */
- context_update(msr, msr_content);
-
- /* Write to hw counters */
- wrmsrl(msr, msr_content);
- return 1;
-}
-
-static int amd_vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content)
-{
- struct vcpu *v = current;
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
-
- if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED)
- || vpmu_is_set(vpmu, VPMU_FROZEN) )
- {
- context_load(v);
- vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
- vpmu_reset(vpmu, VPMU_FROZEN);
- }
-
- rdmsrl(msr, *msr_content);
-
- return 1;
-}
-
-static int amd_vpmu_initialise(struct vcpu *v)
-{
- struct xen_pmu_amd_ctxt *ctxt;
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
- uint8_t family = current_cpu_data.x86;
-
- if ( vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
- return 0;
-
- if ( counters == NULL )
- {
- switch ( family )
- {
- case 0x15:
- num_counters = F15H_NUM_COUNTERS;
- counters = AMD_F15H_COUNTERS;
- ctrls = AMD_F15H_CTRLS;
- k7_counters_mirrored = 1;
- break;
- case 0x10:
- case 0x12:
- case 0x14:
- case 0x16:
- default:
- num_counters = F10H_NUM_COUNTERS;
- counters = AMD_F10H_COUNTERS;
- ctrls = AMD_F10H_CTRLS;
- k7_counters_mirrored = 0;
- break;
- }
- }
-
- if ( has_hvm_container_domain(v->domain) )
- {
- ctxt = xzalloc_bytes(sizeof(struct xen_pmu_amd_ctxt) +
- sizeof(uint64_t) * AMD_MAX_COUNTERS +
- sizeof(uint64_t) * AMD_MAX_COUNTERS);
- if ( !ctxt )
- {
- gdprintk(XENLOG_WARNING, "Insufficient memory for PMU, "
- " PMU feature is unavailable on domain %d vcpu %d.\n",
- v->vcpu_id, v->domain->domain_id);
- return -ENOMEM;
- }
- }
- else
- ctxt = &v->arch.vpmu.xenpmu_data->pmu.c.amd;
-
- ctxt->counters = sizeof(struct xen_pmu_amd_ctxt);
- ctxt->ctrls = ctxt->counters + sizeof(uint64_t) * AMD_MAX_COUNTERS;
-
- vpmu->context = ctxt;
- vpmu_set(vpmu, VPMU_CONTEXT_ALLOCATED);
- return 0;
-}
-
-static void amd_vpmu_destroy(struct vcpu *v)
-{
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
-
- if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
- return;
-
- if ( has_hvm_container_domain(v->domain) )
- {
- if ( ((struct xen_pmu_amd_ctxt *)vpmu->context)->msr_bitmap_set )
- amd_vpmu_unset_msr_bitmap(v);
-
- xfree(vpmu->context);
- }
-
- vpmu->context = NULL;
- vpmu_clear(vpmu);
- release_pmu_ownship(PMU_OWNER_HVM);
-}
-
-/* VPMU part of the 'q' keyhandler */
-static void amd_vpmu_dump(const struct vcpu *v)
-{
- const struct vpmu_struct *vpmu = vcpu_vpmu(v);
- const struct xen_pmu_amd_ctxt *ctxt = vpmu->context;
- uint64_t *counter_regs = vpmu_reg_pointer(ctxt, counters);
- uint64_t *ctrl_regs = vpmu_reg_pointer(ctxt, ctrls);
- unsigned int i;
-
- printk(" VPMU state: 0x%x ", vpmu->flags);
- if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
- {
- printk("\n");
- return;
- }
-
- printk("(");
- if ( vpmu_is_set(vpmu, VPMU_PASSIVE_DOMAIN_ALLOCATED) )
- printk("PASSIVE_DOMAIN_ALLOCATED, ");
- if ( vpmu_is_set(vpmu, VPMU_FROZEN) )
- printk("FROZEN, ");
- if ( vpmu_is_set(vpmu, VPMU_CONTEXT_SAVE) )
- printk("SAVE, ");
- if ( vpmu_is_set(vpmu, VPMU_RUNNING) )
- printk("RUNNING, ");
- if ( vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
- printk("LOADED, ");
- printk("ALLOCATED)\n");
-
- for ( i = 0; i < num_counters; i++ )
- {
- uint64_t ctrl, cntr;
-
- rdmsrl(ctrls[i], ctrl);
- rdmsrl(counters[i], cntr);
- printk(" %#x: %#lx (%#lx in HW) %#x: %#lx (%#lx in HW)\n",
- ctrls[i], ctrl_regs[i], ctrl,
- counters[i], counter_regs[i], cntr);
- }
-}
-
-struct arch_vpmu_ops amd_vpmu_ops = {
- .do_wrmsr = amd_vpmu_do_wrmsr,
- .do_rdmsr = amd_vpmu_do_rdmsr,
- .do_interrupt = amd_vpmu_do_interrupt,
- .arch_vpmu_destroy = amd_vpmu_destroy,
- .arch_vpmu_save = amd_vpmu_save,
- .arch_vpmu_load = amd_vpmu_load,
- .arch_vpmu_dump = amd_vpmu_dump
-};
-
-int svm_vpmu_initialise(struct vcpu *v)
-{
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
- uint8_t family = current_cpu_data.x86;
- int ret = 0;
-
- /* vpmu enabled? */
- if ( vpmu_mode == XENPMU_MODE_OFF )
- return 0;
-
- switch ( family )
- {
- case 0x10:
- case 0x12:
- case 0x14:
- case 0x15:
- case 0x16:
- ret = amd_vpmu_initialise(v);
- if ( !ret )
- vpmu->arch_vpmu_ops = &amd_vpmu_ops;
- return ret;
- }
-
- printk("VPMU: Initialization failed. "
- "AMD processor family %d has not "
- "been supported\n", family);
- return -EINVAL;
-}
-
diff --git a/xen/arch/x86/hvm/vlapic.c b/xen/arch/x86/hvm/vlapic.c
index d954f4f..d49ed3a 100644
--- a/xen/arch/x86/hvm/vlapic.c
+++ b/xen/arch/x86/hvm/vlapic.c
@@ -38,7 +38,7 @@
#include <asm/hvm/support.h>
#include <asm/hvm/vmx/vmx.h>
#include <asm/hvm/nestedhvm.h>
-#include <asm/hvm/vpmu.h>
+#include <asm/vpmu.h>
#include <public/hvm/ioreq.h>
#include <public/hvm/params.h>
diff --git a/xen/arch/x86/hvm/vmx/Makefile b/xen/arch/x86/hvm/vmx/Makefile
index 373b3d9..04a29ce 100644
--- a/xen/arch/x86/hvm/vmx/Makefile
+++ b/xen/arch/x86/hvm/vmx/Makefile
@@ -3,5 +3,4 @@ obj-y += intr.o
obj-y += realmode.o
obj-y += vmcs.o
obj-y += vmx.o
-obj-y += vpmu_core2.o
obj-y += vvmx.o
diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c b/xen/arch/x86/hvm/vmx/vpmu_core2.c
deleted file mode 100644
index 5a07817..0000000
--- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
+++ /dev/null
@@ -1,940 +0,0 @@
-/*
- * vpmu_core2.c: CORE 2 specific PMU virtualization for HVM domain.
- *
- * Copyright (c) 2007, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307 USA.
- *
- * Author: Haitao Shan <haitao.shan@intel.com>
- */
-
-#include <xen/config.h>
-#include <xen/sched.h>
-#include <xen/xenoprof.h>
-#include <xen/irq.h>
-#include <asm/system.h>
-#include <asm/regs.h>
-#include <asm/types.h>
-#include <asm/apic.h>
-#include <asm/traps.h>
-#include <asm/msr.h>
-#include <asm/msr-index.h>
-#include <asm/hvm/support.h>
-#include <asm/hvm/vlapic.h>
-#include <asm/hvm/vmx/vmx.h>
-#include <asm/hvm/vmx/vmcs.h>
-#include <public/sched.h>
-#include <public/hvm/save.h>
-#include <public/pmu.h>
-#include <asm/hvm/vpmu.h>
-
-/*
- * See Intel SDM Vol 2a Instruction Set Reference chapter 3 for CPUID
- * instruction.
- * cpuid 0xa - Architectural Performance Monitoring Leaf
- * Register eax
- */
-#define PMU_VERSION_SHIFT 0 /* Version ID */
-#define PMU_VERSION_BITS 8 /* 8 bits 0..7 */
-#define PMU_VERSION_MASK (((1 << PMU_VERSION_BITS) - 1) << PMU_VERSION_SHIFT)
-
-#define PMU_GENERAL_NR_SHIFT 8 /* Number of general pmu registers */
-#define PMU_GENERAL_NR_BITS 8 /* 8 bits 8..15 */
-#define PMU_GENERAL_NR_MASK (((1 << PMU_GENERAL_NR_BITS) - 1) << PMU_GENERAL_NR_SHIFT)
-
-#define PMU_GENERAL_WIDTH_SHIFT 16 /* Width of general pmu registers */
-#define PMU_GENERAL_WIDTH_BITS 8 /* 8 bits 16..23 */
-#define PMU_GENERAL_WIDTH_MASK (((1 << PMU_GENERAL_WIDTH_BITS) - 1) << PMU_GENERAL_WIDTH_SHIFT)
-/* Register edx */
-#define PMU_FIXED_NR_SHIFT 0 /* Number of fixed pmu registers */
-#define PMU_FIXED_NR_BITS 5 /* 5 bits 0..4 */
-#define PMU_FIXED_NR_MASK (((1 << PMU_FIXED_NR_BITS) -1) << PMU_FIXED_NR_SHIFT)
-
-#define PMU_FIXED_WIDTH_SHIFT 5 /* Width of fixed pmu registers */
-#define PMU_FIXED_WIDTH_BITS 8 /* 8 bits 5..12 */
-#define PMU_FIXED_WIDTH_MASK (((1 << PMU_FIXED_WIDTH_BITS) -1) << PMU_FIXED_WIDTH_SHIFT)
-
-/* Alias registers (0x4c1) for full-width writes to PMCs */
-#define MSR_PMC_ALIAS_MASK (~(MSR_IA32_PERFCTR0 ^ MSR_IA32_A_PERFCTR0))
-static bool_t __read_mostly full_width_write;
-
-/* Intel-specific VPMU features */
-#define VPMU_CPU_HAS_DS 0x100 /* Has Debug Store */
-#define VPMU_CPU_HAS_BTS 0x200 /* Has Branch Trace Store */
-
-/*
- * MSR_CORE_PERF_FIXED_CTR_CTRL contains the configuration of all fixed
- * counters. 4 bits for every counter.
- */
-#define FIXED_CTR_CTRL_BITS 4
-#define FIXED_CTR_CTRL_MASK ((1 << FIXED_CTR_CTRL_BITS) - 1)
-
-/* Number of general-purpose and fixed performance counters */
-static unsigned int __read_mostly arch_pmc_cnt, fixed_pmc_cnt;
-
-/*
- * QUIRK to workaround an issue on various family 6 cpus.
- * The issue leads to endless PMC interrupt loops on the processor.
- * If the interrupt handler is running and a pmc reaches the value 0, this
- * value remains forever and it triggers immediately a new interrupt after
- * finishing the handler.
- * A workaround is to read all flagged counters and if the value is 0 write
- * 1 (or another value != 0) into it.
- * There exist no errata and the real cause of this behaviour is unknown.
- */
-bool_t __read_mostly is_pmc_quirk;
-
-static void check_pmc_quirk(void)
-{
- if ( current_cpu_data.x86 == 6 )
- is_pmc_quirk = 1;
- else
- is_pmc_quirk = 0;
-}
-
-static void handle_pmc_quirk(u64 msr_content)
-{
- int i;
- u64 val;
-
- if ( !is_pmc_quirk )
- return;
-
- val = msr_content;
- for ( i = 0; i < arch_pmc_cnt; i++ )
- {
- if ( val & 0x1 )
- {
- u64 cnt;
- rdmsrl(MSR_P6_PERFCTR0 + i, cnt);
- if ( cnt == 0 )
- wrmsrl(MSR_P6_PERFCTR0 + i, 1);
- }
- val >>= 1;
- }
- val = msr_content >> 32;
- for ( i = 0; i < fixed_pmc_cnt; i++ )
- {
- if ( val & 0x1 )
- {
- u64 cnt;
- rdmsrl(MSR_CORE_PERF_FIXED_CTR0 + i, cnt);
- if ( cnt == 0 )
- wrmsrl(MSR_CORE_PERF_FIXED_CTR0 + i, 1);
- }
- val >>= 1;
- }
-}
-
-/*
- * Read the number of general counters via CPUID.EAX[0xa].EAX[8..15]
- */
-static int core2_get_arch_pmc_count(void)
-{
- u32 eax;
-
- eax = cpuid_eax(0xa);
- return ( (eax & PMU_GENERAL_NR_MASK) >> PMU_GENERAL_NR_SHIFT );
-}
-
-/*
- * Read the number of fixed counters via CPUID.EDX[0xa].EDX[0..4]
- */
-static int core2_get_fixed_pmc_count(void)
-{
- u32 eax;
-
- eax = cpuid_eax(0xa);
- return ( (eax & PMU_FIXED_NR_MASK) >> PMU_FIXED_NR_SHIFT );
-}
-
-/* edx bits 5-12: Bit width of fixed-function performance counters */
-static int core2_get_bitwidth_fix_count(void)
-{
- u32 edx;
-
- edx = cpuid_edx(0xa);
- return ( (edx & PMU_FIXED_WIDTH_MASK) >> PMU_FIXED_WIDTH_SHIFT );
-}
-
-static int is_core2_vpmu_msr(u32 msr_index, int *type, int *index)
-{
- int i;
- u32 msr_index_pmc;
-
- for ( i = 0; i < fixed_pmc_cnt; i++ )
- {
- if ( msr_index == MSR_CORE_PERF_FIXED_CTR0 + i )
- {
- *type = MSR_TYPE_COUNTER;
- *index = i;
- return 1;
- }
- }
-
- if ( (msr_index == MSR_CORE_PERF_FIXED_CTR_CTRL ) ||
- (msr_index == MSR_IA32_DS_AREA) ||
- (msr_index == MSR_IA32_PEBS_ENABLE) )
- {
- *type = MSR_TYPE_CTRL;
- return 1;
- }
-
- if ( (msr_index == MSR_CORE_PERF_GLOBAL_CTRL) ||
- (msr_index == MSR_CORE_PERF_GLOBAL_STATUS) ||
- (msr_index == MSR_CORE_PERF_GLOBAL_OVF_CTRL) )
- {
- *type = MSR_TYPE_GLOBAL;
- return 1;
- }
-
- msr_index_pmc = msr_index & MSR_PMC_ALIAS_MASK;
- if ( (msr_index_pmc >= MSR_IA32_PERFCTR0) &&
- (msr_index_pmc < (MSR_IA32_PERFCTR0 + arch_pmc_cnt)) )
- {
- *type = MSR_TYPE_ARCH_COUNTER;
- *index = msr_index_pmc - MSR_IA32_PERFCTR0;
- return 1;
- }
-
- if ( (msr_index >= MSR_P6_EVNTSEL0) &&
- (msr_index < (MSR_P6_EVNTSEL0 + arch_pmc_cnt)) )
- {
- *type = MSR_TYPE_ARCH_CTRL;
- *index = msr_index - MSR_P6_EVNTSEL0;
- return 1;
- }
-
- return 0;
-}
-
-#define msraddr_to_bitpos(x) (((x)&0xffff) + ((x)>>31)*0x2000)
-static void core2_vpmu_set_msr_bitmap(unsigned long *msr_bitmap)
-{
- int i;
-
- /* Allow Read/Write PMU Counters MSR Directly. */
- for ( i = 0; i < fixed_pmc_cnt; i++ )
- {
- clear_bit(msraddr_to_bitpos(MSR_CORE_PERF_FIXED_CTR0 + i), msr_bitmap);
- clear_bit(msraddr_to_bitpos(MSR_CORE_PERF_FIXED_CTR0 + i),
- msr_bitmap + 0x800/BYTES_PER_LONG);
- }
- for ( i = 0; i < arch_pmc_cnt; i++ )
- {
- clear_bit(msraddr_to_bitpos(MSR_IA32_PERFCTR0+i), msr_bitmap);
- clear_bit(msraddr_to_bitpos(MSR_IA32_PERFCTR0+i),
- msr_bitmap + 0x800/BYTES_PER_LONG);
-
- if ( full_width_write )
- {
- clear_bit(msraddr_to_bitpos(MSR_IA32_A_PERFCTR0 + i), msr_bitmap);
- clear_bit(msraddr_to_bitpos(MSR_IA32_A_PERFCTR0 + i),
- msr_bitmap + 0x800/BYTES_PER_LONG);
- }
- }
-
- /* Allow Read PMU Non-global Controls Directly. */
- for ( i = 0; i < arch_pmc_cnt; i++ )
- clear_bit(msraddr_to_bitpos(MSR_P6_EVNTSEL0 + i), msr_bitmap);
-
- clear_bit(msraddr_to_bitpos(MSR_CORE_PERF_FIXED_CTR_CTRL), msr_bitmap);
- clear_bit(msraddr_to_bitpos(MSR_IA32_PEBS_ENABLE), msr_bitmap);
- clear_bit(msraddr_to_bitpos(MSR_IA32_DS_AREA), msr_bitmap);
-}
-
-static void core2_vpmu_unset_msr_bitmap(unsigned long *msr_bitmap)
-{
- int i;
-
- for ( i = 0; i < fixed_pmc_cnt; i++ )
- {
- set_bit(msraddr_to_bitpos(MSR_CORE_PERF_FIXED_CTR0 + i), msr_bitmap);
- set_bit(msraddr_to_bitpos(MSR_CORE_PERF_FIXED_CTR0 + i),
- msr_bitmap + 0x800/BYTES_PER_LONG);
- }
- for ( i = 0; i < arch_pmc_cnt; i++ )
- {
- set_bit(msraddr_to_bitpos(MSR_IA32_PERFCTR0 + i), msr_bitmap);
- set_bit(msraddr_to_bitpos(MSR_IA32_PERFCTR0 + i),
- msr_bitmap + 0x800/BYTES_PER_LONG);
-
- if ( full_width_write )
- {
- set_bit(msraddr_to_bitpos(MSR_IA32_A_PERFCTR0 + i), msr_bitmap);
- set_bit(msraddr_to_bitpos(MSR_IA32_A_PERFCTR0 + i),
- msr_bitmap + 0x800/BYTES_PER_LONG);
- }
- }
-
- for ( i = 0; i < arch_pmc_cnt; i++ )
- set_bit(msraddr_to_bitpos(MSR_P6_EVNTSEL0 + i), msr_bitmap);
-
- set_bit(msraddr_to_bitpos(MSR_CORE_PERF_FIXED_CTR_CTRL), msr_bitmap);
- set_bit(msraddr_to_bitpos(MSR_IA32_PEBS_ENABLE), msr_bitmap);
- set_bit(msraddr_to_bitpos(MSR_IA32_DS_AREA), msr_bitmap);
-}
-
-static inline void __core2_vpmu_save(struct vcpu *v)
-{
- int i;
- struct xen_pmu_intel_ctxt *core2_vpmu_cxt = vcpu_vpmu(v)->context;
- uint64_t *fixed_counters = vpmu_reg_pointer(core2_vpmu_cxt, fixed_counters);
- struct xen_pmu_cntr_pair *xen_pmu_cntr_pair =
- vpmu_reg_pointer(core2_vpmu_cxt, arch_counters);
-
- for ( i = 0; i < fixed_pmc_cnt; i++ )
- rdmsrl(MSR_CORE_PERF_FIXED_CTR0 + i, fixed_counters[i]);
- for ( i = 0; i < arch_pmc_cnt; i++ )
- rdmsrl(MSR_IA32_PERFCTR0 + i, xen_pmu_cntr_pair[i].counter);
-
- if ( !has_hvm_container_domain(v->domain) )
- rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS, core2_vpmu_cxt->global_status);
-}
-
-/* Must be NMI-safe */
-static int core2_vpmu_save(struct vcpu *v)
-{
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
-
- if ( !has_hvm_container_domain(v->domain) )
- wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0);
-
- if ( !vpmu_is_set_all(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED) )
- return 0;
-
- __core2_vpmu_save(v);
-
- /* Unset PMU MSR bitmap to trap lazy load. */
- if ( !vpmu_is_set(vpmu, VPMU_RUNNING) && cpu_has_vmx_msr_bitmap
- && has_hvm_container_domain(v->domain) )
- core2_vpmu_unset_msr_bitmap(v->arch.hvm_vmx.msr_bitmap);
-
- return 1;
-}
-
-static inline void __core2_vpmu_load(struct vcpu *v)
-{
- unsigned int i, pmc_start;
- struct xen_pmu_intel_ctxt *core2_vpmu_cxt = vcpu_vpmu(v)->context;
- uint64_t *fixed_counters = vpmu_reg_pointer(core2_vpmu_cxt, fixed_counters);
- struct xen_pmu_cntr_pair *xen_pmu_cntr_pair =
- vpmu_reg_pointer(core2_vpmu_cxt, arch_counters);
-
- for ( i = 0; i < fixed_pmc_cnt; i++ )
- wrmsrl(MSR_CORE_PERF_FIXED_CTR0 + i, fixed_counters[i]);
-
- if ( full_width_write )
- pmc_start = MSR_IA32_A_PERFCTR0;
- else
- pmc_start = MSR_IA32_PERFCTR0;
- for ( i = 0; i < arch_pmc_cnt; i++ )
- {
- wrmsrl(pmc_start + i, xen_pmu_cntr_pair[i].counter);
- wrmsrl(MSR_P6_EVNTSEL0 + i, xen_pmu_cntr_pair[i].control);
- }
-
- wrmsrl(MSR_CORE_PERF_FIXED_CTR_CTRL, core2_vpmu_cxt->fixed_ctrl);
- wrmsrl(MSR_IA32_DS_AREA, core2_vpmu_cxt->ds_area);
- wrmsrl(MSR_IA32_PEBS_ENABLE, core2_vpmu_cxt->pebs_enable);
-
- if ( !has_hvm_container_domain(v->domain) )
- {
- wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, core2_vpmu_cxt->global_ovf_ctrl);
- core2_vpmu_cxt->global_ovf_ctrl = 0;
- wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, core2_vpmu_cxt->global_ctrl);
- }
-}
-
-static void core2_vpmu_load(struct vcpu *v)
-{
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
-
- if ( vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
- return;
-
- vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
-
- __core2_vpmu_load(v);
-}
-
-static int core2_vpmu_alloc_resource(struct vcpu *v)
-{
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct xen_pmu_intel_ctxt *core2_vpmu_cxt;
-
- if ( !is_pv_domain(v->domain) )
- {
- if ( !acquire_pmu_ownership(PMU_OWNER_HVM) )
- return 0;
-
- wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0);
- if ( vmx_add_host_load_msr(MSR_CORE_PERF_GLOBAL_CTRL) )
- goto out_err;
-
- if ( vmx_add_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL) )
- goto out_err;
- vmx_write_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, 0);
-
- core2_vpmu_cxt = xzalloc_bytes(sizeof(struct xen_pmu_intel_ctxt) +
- sizeof(uint64_t) * fixed_pmc_cnt +
- sizeof(struct xen_pmu_cntr_pair) * arch_pmc_cnt);
- if ( !core2_vpmu_cxt )
- goto out_err;
- }
- else
- {
- core2_vpmu_cxt = &v->arch.vpmu.xenpmu_data->pmu.c.intel;
- vpmu_set(vpmu, VPMU_CONTEXT_ALLOCATED);
- }
-
- core2_vpmu_cxt->fixed_counters = sizeof(struct xen_pmu_intel_ctxt);
- core2_vpmu_cxt->arch_counters = core2_vpmu_cxt->fixed_counters +
- sizeof(uint64_t) * fixed_pmc_cnt;
-
- vpmu->context = (void *)core2_vpmu_cxt;
-
- vpmu_set(vpmu, VPMU_CONTEXT_ALLOCATED);
-
- return 1;
-
-out_err:
- vmx_rm_host_load_msr(MSR_CORE_PERF_GLOBAL_CTRL);
- vmx_rm_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL);
- release_pmu_ownship(PMU_OWNER_HVM);
-
- printk("Failed to allocate VPMU resources for domain %u vcpu %u\n",
- v->vcpu_id, v->domain->domain_id);
-
- return 0;
-}
-
-static int core2_vpmu_msr_common_check(u32 msr_index, int *type, int *index)
-{
- struct vpmu_struct *vpmu = vcpu_vpmu(current);
-
- if ( !is_core2_vpmu_msr(msr_index, type, index) )
- return 0;
-
- if ( unlikely(!vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED)) &&
- !core2_vpmu_alloc_resource(current) )
- return 0;
-
- /* Do the lazy load staff. */
- if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
- {
- __core2_vpmu_load(current);
- vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
- if ( cpu_has_vmx_msr_bitmap && has_hvm_container_domain(current->domain) )
- core2_vpmu_set_msr_bitmap(current->arch.hvm_vmx.msr_bitmap);
- }
- return 1;
-}
-
-static void inject_trap(struct vcpu *v, unsigned int trapno)
-{
- if ( has_hvm_container_domain(v->domain) )
- hvm_inject_hw_exception(trapno, 0);
- else
- send_guest_trap(v->domain, v->vcpu_id, trapno);
-}
-
-static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
-{
- u64 global_ctrl, non_global_ctrl;
- unsigned pmu_enable = 0;
- int i, tmp;
- int type = -1, index = -1;
- struct vcpu *v = current;
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct xen_pmu_intel_ctxt *core2_vpmu_cxt = NULL;
-
- if ( !core2_vpmu_msr_common_check(msr, &type, &index) )
- {
- /* Special handling for BTS */
- if ( msr == MSR_IA32_DEBUGCTLMSR )
- {
- uint64_t supported = IA32_DEBUGCTLMSR_TR | IA32_DEBUGCTLMSR_BTS |
- IA32_DEBUGCTLMSR_BTINT;
-
- if ( cpu_has(¤t_cpu_data, X86_FEATURE_DSCPL) )
- supported |= IA32_DEBUGCTLMSR_BTS_OFF_OS |
- IA32_DEBUGCTLMSR_BTS_OFF_USR;
- if ( msr_content & supported )
- {
- if ( vpmu_is_set(vpmu, VPMU_CPU_HAS_BTS) )
- return 1;
- gdprintk(XENLOG_WARNING, "Debug Store is not supported on this cpu\n");
- inject_trap(v, TRAP_gp_fault);
- return 0;
- }
- }
- return 0;
- }
-
- core2_vpmu_cxt = vpmu->context;
- switch ( msr )
- {
- case MSR_CORE_PERF_GLOBAL_OVF_CTRL:
- core2_vpmu_cxt->global_status &= ~msr_content;
- wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, msr_content);
- return 1;
- case MSR_CORE_PERF_GLOBAL_STATUS:
- gdprintk(XENLOG_INFO, "Can not write readonly MSR: "
- "MSR_PERF_GLOBAL_STATUS(0x38E)!\n");
- inject_trap(v, TRAP_gp_fault);
- return 1;
- case MSR_IA32_PEBS_ENABLE:
- if ( msr_content & 1 )
- gdprintk(XENLOG_WARNING, "Guest is trying to enable PEBS, "
- "which is not supported.\n");
- core2_vpmu_cxt->pebs_enable = msr_content;
- return 1;
- case MSR_IA32_DS_AREA:
- if ( vpmu_is_set(vpmu, VPMU_CPU_HAS_DS) )
- {
- if ( !is_canonical_address(msr_content) )
- {
- gdprintk(XENLOG_WARNING,
- "Illegal address for IA32_DS_AREA: %#" PRIx64 "x\n",
- msr_content);
- inject_trap(v, TRAP_gp_fault);
- return 1;
- }
- core2_vpmu_cxt->ds_area = msr_content;
- break;
- }
- gdprintk(XENLOG_WARNING, "Guest setting of DTS is ignored.\n");
- return 1;
- case MSR_CORE_PERF_GLOBAL_CTRL:
- global_ctrl = msr_content;
- for ( i = 0; i < arch_pmc_cnt; i++ )
- {
- rdmsrl(MSR_P6_EVNTSEL0+i, non_global_ctrl);
- pmu_enable += global_ctrl & (non_global_ctrl >> 22) & 1;
- global_ctrl >>= 1;
- }
-
- rdmsrl(MSR_CORE_PERF_FIXED_CTR_CTRL, non_global_ctrl);
- global_ctrl = msr_content >> 32;
- for ( i = 0; i < fixed_pmc_cnt; i++ )
- {
- pmu_enable += (global_ctrl & 1) & ((non_global_ctrl & 0x3)? 1 : 0);
- non_global_ctrl >>= FIXED_CTR_CTRL_BITS;
- global_ctrl >>= 1;
- }
- core2_vpmu_cxt->global_ctrl = msr_content;
- break;
- case MSR_CORE_PERF_FIXED_CTR_CTRL:
- non_global_ctrl = msr_content;
- if ( has_hvm_container_domain(v->domain) )
- vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, &global_ctrl);
- else
- rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, global_ctrl);
- global_ctrl >>= 32;
- for ( i = 0; i < fixed_pmc_cnt; i++ )
- {
- pmu_enable += (global_ctrl & 1) & ((non_global_ctrl & 0x3)? 1 : 0);
- non_global_ctrl >>= 4;
- global_ctrl >>= 1;
- }
- core2_vpmu_cxt->fixed_ctrl = msr_content;
- break;
- default:
- tmp = msr - MSR_P6_EVNTSEL0;
- if ( tmp >= 0 && tmp < arch_pmc_cnt )
- {
- struct xen_pmu_cntr_pair *xen_pmu_cntr_pair =
- vpmu_reg_pointer(core2_vpmu_cxt, arch_counters);
-
- if ( has_hvm_container_domain(v->domain) )
- vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, &global_ctrl);
- else
- rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, global_ctrl);
- xen_pmu_cntr_pair[tmp].control = msr_content;
- for ( i = 0; i < arch_pmc_cnt && !pmu_enable; i++ )
- pmu_enable += (global_ctrl >> i) &
- (xen_pmu_cntr_pair[i].control >> 22) & 1;
- }
- }
-
- pmu_enable += (core2_vpmu_cxt->ds_area != 0);
- if ( pmu_enable )
- vpmu_set(vpmu, VPMU_RUNNING);
- else
- vpmu_reset(vpmu, VPMU_RUNNING);
-
- if ( type != MSR_TYPE_GLOBAL )
- {
- u64 mask;
- int inject_gp = 0;
- switch ( type )
- {
- case MSR_TYPE_ARCH_CTRL: /* MSR_P6_EVNTSEL[0,...] */
- mask = ~((1ull << 32) - 1);
- if (msr_content & mask)
- inject_gp = 1;
- break;
- case MSR_TYPE_CTRL: /* IA32_FIXED_CTR_CTRL */
- if ( msr == MSR_IA32_DS_AREA )
- break;
- /* 4 bits per counter, currently 3 fixed counters implemented. */
- mask = ~((1ull << (fixed_pmc_cnt * FIXED_CTR_CTRL_BITS)) - 1);
- if (msr_content & mask)
- inject_gp = 1;
- break;
- case MSR_TYPE_COUNTER: /* IA32_FIXED_CTR[0-2] */
- mask = ~((1ull << core2_get_bitwidth_fix_count()) - 1);
- if (msr_content & mask)
- inject_gp = 1;
- break;
- }
-
- if (inject_gp)
- inject_trap(v, TRAP_gp_fault);
- else
- wrmsrl(msr, msr_content);
- }
- else
- {
- if ( has_hvm_container_domain(v->domain) )
- vmx_write_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, msr_content);
- else
- wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, msr_content);
- }
-
- return 1;
-}
-
-static int core2_vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content)
-{
- int type = -1, index = -1;
- struct vcpu *v = current;
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct xen_pmu_intel_ctxt *core2_vpmu_cxt = NULL;
-
- if ( core2_vpmu_msr_common_check(msr, &type, &index) )
- {
- core2_vpmu_cxt = vpmu->context;
- switch ( msr )
- {
- case MSR_CORE_PERF_GLOBAL_OVF_CTRL:
- *msr_content = 0;
- break;
- case MSR_CORE_PERF_GLOBAL_STATUS:
- *msr_content = core2_vpmu_cxt->global_status;
- break;
- case MSR_CORE_PERF_GLOBAL_CTRL:
- if ( has_hvm_container_domain(v->domain) )
- vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, msr_content);
- else
- rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, *msr_content);
- break;
- default:
- rdmsrl(msr, *msr_content);
- }
- }
- else
- {
- /* Extension for BTS */
- if ( msr == MSR_IA32_MISC_ENABLE )
- {
- if ( vpmu_is_set(vpmu, VPMU_CPU_HAS_BTS) )
- *msr_content &= ~MSR_IA32_MISC_ENABLE_BTS_UNAVAIL;
- }
- else
- return 0;
- }
-
- return 1;
-}
-
-static void core2_vpmu_do_cpuid(unsigned int input,
- unsigned int *eax, unsigned int *ebx,
- unsigned int *ecx, unsigned int *edx)
-{
- if (input == 0x1)
- {
- struct vpmu_struct *vpmu = vcpu_vpmu(current);
-
- if ( vpmu_is_set(vpmu, VPMU_CPU_HAS_DS) )
- {
- /* Switch on the 'Debug Store' feature in CPUID.EAX[1]:EDX[21] */
- *edx |= cpufeat_mask(X86_FEATURE_DS);
- if ( cpu_has(¤t_cpu_data, X86_FEATURE_DTES64) )
- *ecx |= cpufeat_mask(X86_FEATURE_DTES64);
- if ( cpu_has(¤t_cpu_data, X86_FEATURE_DSCPL) )
- *ecx |= cpufeat_mask(X86_FEATURE_DSCPL);
- }
- }
-}
-
-/* Dump vpmu info on console, called in the context of keyhandler 'q'. */
-static void core2_vpmu_dump(const struct vcpu *v)
-{
- const struct vpmu_struct *vpmu = vcpu_vpmu(v);
- int i;
- const struct xen_pmu_intel_ctxt *core2_vpmu_cxt = NULL;
- u64 val;
- uint64_t *fixed_counters = vpmu_reg_pointer(core2_vpmu_cxt, fixed_counters);
- struct xen_pmu_cntr_pair *xen_pmu_cntr_pair =
- vpmu_reg_pointer(core2_vpmu_cxt, arch_counters);
-
- if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
- return;
-
- if ( !vpmu_is_set(vpmu, VPMU_RUNNING) )
- {
- if ( vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
- printk(" vPMU loaded\n");
- else
- printk(" vPMU allocated\n");
- return;
- }
-
- printk(" vPMU running\n");
- core2_vpmu_cxt = vpmu->context;
-
- /* Print the contents of the counter and its configuration msr. */
- for ( i = 0; i < arch_pmc_cnt; i++ )
- printk(" general_%d: 0x%016lx ctrl: 0x%016lx\n",
- i, xen_pmu_cntr_pair[i].counter, xen_pmu_cntr_pair[i].control);
-
- /*
- * The configuration of the fixed counter is 4 bits each in the
- * MSR_CORE_PERF_FIXED_CTR_CTRL.
- */
- val = core2_vpmu_cxt->fixed_ctrl;
- for ( i = 0; i < fixed_pmc_cnt; i++ )
- {
- printk(" fixed_%d: 0x%016lx ctrl: %#lx\n",
- i, fixed_counters[i],
- val & FIXED_CTR_CTRL_MASK);
- val >>= FIXED_CTR_CTRL_BITS;
- }
-}
-
-static int core2_vpmu_do_interrupt(struct cpu_user_regs *regs)
-{
- struct vcpu *v = current;
- u64 msr_content;
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
- struct xen_pmu_intel_ctxt *core2_vpmu_cxt = vpmu->context;
-
- rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS, msr_content);
- if ( msr_content )
- {
- if ( is_pmc_quirk )
- handle_pmc_quirk(msr_content);
- core2_vpmu_cxt->global_status |= msr_content;
- msr_content = 0xC000000700000000 | ((1 << arch_pmc_cnt) - 1);
- wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, msr_content);
- }
- else
- {
- /* No PMC overflow but perhaps a Trace Message interrupt. */
- __vmread(GUEST_IA32_DEBUGCTL, &msr_content);
- if ( !(msr_content & IA32_DEBUGCTLMSR_TR) )
- return 0;
- }
-
- return 1;
-}
-
-static int core2_vpmu_initialise(struct vcpu *v)
-{
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
- u64 msr_content;
- struct cpuinfo_x86 *c = ¤t_cpu_data;
-
- if ( !(vpmu_features & XENPMU_FEATURE_INTEL_BTS) )
- goto func_out;
- /* Check the 'Debug Store' feature in the CPUID.EAX[1]:EDX[21] */
- if ( cpu_has(c, X86_FEATURE_DS) )
- {
- if ( !cpu_has(c, X86_FEATURE_DTES64) )
- {
- printk(XENLOG_G_WARNING "CPU doesn't support 64-bit DS Area"
- " - Debug Store disabled for d%d:v%d\n",
- v->domain->domain_id, v->vcpu_id);
- goto func_out;
- }
- vpmu_set(vpmu, VPMU_CPU_HAS_DS);
- rdmsrl(MSR_IA32_MISC_ENABLE, msr_content);
- if ( msr_content & MSR_IA32_MISC_ENABLE_BTS_UNAVAIL )
- {
- /* If BTS_UNAVAIL is set reset the DS feature. */
- vpmu_reset(vpmu, VPMU_CPU_HAS_DS);
- printk(XENLOG_G_WARNING "CPU has set BTS_UNAVAIL"
- " - Debug Store disabled for d%d:v%d\n",
- v->domain->domain_id, v->vcpu_id);
- }
- else
- {
- vpmu_set(vpmu, VPMU_CPU_HAS_BTS);
- if ( !cpu_has(c, X86_FEATURE_DSCPL) )
- printk(XENLOG_G_INFO
- "vpmu: CPU doesn't support CPL-Qualified BTS\n");
- printk("******************************************************\n");
- printk("** WARNING: Emulation of BTS Feature is switched on **\n");
- printk("** Using this processor feature in a virtualized **\n");
- printk("** environment is not 100%% safe. **\n");
- printk("** Setting the DS buffer address with wrong values **\n");
- printk("** may lead to hypervisor hangs or crashes. **\n");
- printk("** It is NOT recommended for production use! **\n");
- printk("******************************************************\n");
- }
- }
-func_out:
-
- arch_pmc_cnt = core2_get_arch_pmc_count();
- fixed_pmc_cnt = core2_get_fixed_pmc_count();
- check_pmc_quirk();
-
- /* PV domains can allocate resources immediately */
- if ( !has_hvm_container_domain(v->domain) && !core2_vpmu_alloc_resource(v) )
- return 1;
-
- return 0;
-}
-
-static void core2_vpmu_destroy(struct vcpu *v)
-{
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
-
- if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
- return;
-
- if ( has_hvm_container_domain(v->domain) )
- {
- xfree(vpmu->context);
- if ( cpu_has_vmx_msr_bitmap )
- core2_vpmu_unset_msr_bitmap(v->arch.hvm_vmx.msr_bitmap);
- }
-
- release_pmu_ownship(PMU_OWNER_HVM);
- vpmu->context = NULL;
- vpmu_clear(vpmu);
-}
-
-struct arch_vpmu_ops core2_vpmu_ops = {
- .do_wrmsr = core2_vpmu_do_wrmsr,
- .do_rdmsr = core2_vpmu_do_rdmsr,
- .do_interrupt = core2_vpmu_do_interrupt,
- .do_cpuid = core2_vpmu_do_cpuid,
- .arch_vpmu_destroy = core2_vpmu_destroy,
- .arch_vpmu_save = core2_vpmu_save,
- .arch_vpmu_load = core2_vpmu_load,
- .arch_vpmu_dump = core2_vpmu_dump
-};
-
-static void core2_no_vpmu_do_cpuid(unsigned int input,
- unsigned int *eax, unsigned int *ebx,
- unsigned int *ecx, unsigned int *edx)
-{
- /*
- * As in this case the vpmu is not enabled reset some bits in the
- * architectural performance monitoring related part.
- */
- if ( input == 0xa )
- {
- *eax &= ~PMU_VERSION_MASK;
- *eax &= ~PMU_GENERAL_NR_MASK;
- *eax &= ~PMU_GENERAL_WIDTH_MASK;
-
- *edx &= ~PMU_FIXED_NR_MASK;
- *edx &= ~PMU_FIXED_WIDTH_MASK;
- }
-}
-
-/*
- * If its a vpmu msr set it to 0.
- */
-static int core2_no_vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content)
-{
- int type = -1, index = -1;
- if ( !is_core2_vpmu_msr(msr, &type, &index) )
- return 0;
- *msr_content = 0;
- return 1;
-}
-
-/*
- * These functions are used in case vpmu is not enabled.
- */
-struct arch_vpmu_ops core2_no_vpmu_ops = {
- .do_rdmsr = core2_no_vpmu_do_rdmsr,
- .do_cpuid = core2_no_vpmu_do_cpuid,
-};
-
-int vmx_vpmu_initialise(struct vcpu *v)
-{
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
- uint8_t family = current_cpu_data.x86;
- uint8_t cpu_model = current_cpu_data.x86_model;
- int ret = 0;
-
- vpmu->arch_vpmu_ops = &core2_no_vpmu_ops;
- if ( vpmu_mode == XENPMU_MODE_OFF )
- return 0;
-
- if ( family == 6 )
- {
- u64 caps;
-
- rdmsrl(MSR_IA32_PERF_CAPABILITIES, caps);
- full_width_write = (caps >> 13) & 1;
-
- switch ( cpu_model )
- {
- /* Core2: */
- case 0x0f: /* original 65 nm celeron/pentium/core2/xeon, "Merom"/"Conroe" */
- case 0x16: /* single-core 65 nm celeron/core2solo "Merom-L"/"Conroe-L" */
- case 0x17: /* 45 nm celeron/core2/xeon "Penryn"/"Wolfdale" */
- case 0x1d: /* six-core 45 nm xeon "Dunnington" */
-
- case 0x2a: /* SandyBridge */
- case 0x2d: /* SandyBridge, "Romley-EP" */
-
- /* Nehalem: */
- case 0x1a: /* 45 nm nehalem, "Bloomfield" */
- case 0x1e: /* 45 nm nehalem, "Lynnfield", "Clarksfield", "Jasper Forest" */
- case 0x2e: /* 45 nm nehalem-ex, "Beckton" */
-
- /* Westmere: */
- case 0x25: /* 32 nm nehalem, "Clarkdale", "Arrandale" */
- case 0x2c: /* 32 nm nehalem, "Gulftown", "Westmere-EP" */
- case 0x27: /* 32 nm Westmere-EX */
-
- case 0x3a: /* IvyBridge */
- case 0x3e: /* IvyBridge EP */
-
- /* Haswell: */
- case 0x3c:
- case 0x3f:
- case 0x45:
- case 0x46:
- ret = core2_vpmu_initialise(v);
- if ( !ret )
- vpmu->arch_vpmu_ops = &core2_vpmu_ops;
- return ret;
- }
- }
-
- printk("VPMU: Initialization failed. "
- "Intel processor family %d model %d has not "
- "been supported\n", family, cpu_model);
- return -EINVAL;
-}
-
diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
deleted file mode 100644
index 3645e4c..0000000
--- a/xen/arch/x86/hvm/vpmu.c
+++ /dev/null
@@ -1,720 +0,0 @@
-/*
- * vpmu.c: PMU virtualization for HVM domain.
- *
- * Copyright (c) 2007, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307 USA.
- *
- * Author: Haitao Shan <haitao.shan@intel.com>
- */
-#include <xen/config.h>
-#include <xen/sched.h>
-#include <xen/xenoprof.h>
-#include <xen/event.h>
-#include <xen/softirq.h>
-#include <xen/hypercall.h>
-#include <xen/guest_access.h>
-#include <asm/regs.h>
-#include <asm/types.h>
-#include <asm/msr.h>
-#include <asm/p2m.h>
-#include <asm/hvm/support.h>
-#include <asm/hvm/vmx/vmx.h>
-#include <asm/hvm/vmx/vmcs.h>
-#include <asm/hvm/vpmu.h>
-#include <asm/hvm/svm/svm.h>
-#include <asm/hvm/svm/vmcb.h>
-#include <asm/apic.h>
-#include <asm/nmi.h>
-#include <public/pmu.h>
-
-/*
- * "vpmu" : vpmu generally enabled
- * "vpmu=off" : vpmu generally disabled
- * "vpmu=bts" : vpmu enabled and Intel BTS feature switched on.
- */
-uint64_t __read_mostly vpmu_mode = XENPMU_MODE_OFF;
-uint64_t __read_mostly vpmu_features = 0;
-static void parse_vpmu_param(char *s);
-custom_param("vpmu", parse_vpmu_param);
-
-static DEFINE_PER_CPU(struct vcpu *, last_vcpu);
-static DEFINE_PER_CPU(struct vcpu *, sampled_vcpu);
-
-static uint32_t __read_mostly vpmu_interrupt_type = PMU_APIC_VECTOR;
-
-static void __init parse_vpmu_param(char *s)
-{
- char *ss;
-
- vpmu_mode = XENPMU_MODE_ON;
- if (*s == '\0')
- return;
-
- do {
- ss = strchr(s, ',');
- if ( ss )
- *ss = '\0';
-
- switch ( parse_bool(s) )
- {
- case 0:
- vpmu_mode = XENPMU_MODE_OFF;
- return;
- case -1:
- if ( !strcmp(s, "nmi") )
- vpmu_interrupt_type = APIC_DM_NMI;
- else if ( !strcmp(s, "bts") )
- vpmu_features |= XENPMU_FEATURE_INTEL_BTS;
- else if ( !strcmp(s, "priv") )
- {
- vpmu_mode &= ~XENPMU_MODE_ON;
- vpmu_mode |= XENPMU_MODE_PRIV;
- }
- else
- {
- printk("VPMU: unknown flag: %s - vpmu disabled!\n", s);
- vpmu_mode = XENPMU_MODE_OFF;
- return;
- }
- default:
- break;
- }
-
- s = ss + 1;
- } while ( ss );
-}
-
-void vpmu_lvtpc_update(uint32_t val)
-{
- struct vpmu_struct *vpmu = vcpu_vpmu(current);
-
- vpmu->hw_lapic_lvtpc = vpmu_interrupt_type | (val & APIC_LVT_MASKED);
-
- /* Postpone APIC updates for PV guests if PMU interrupt is pending */
- if ( !has_hvm_container_domain(current->domain) ||
- !(current->arch.vpmu.xenpmu_data &&
- current->arch.vpmu.xenpmu_data->pmu_flags & PMU_CACHED) )
- apic_write(APIC_LVTPC, vpmu->hw_lapic_lvtpc);
-}
-
-static void vpmu_send_nmi(struct vcpu *v)
-{
- struct vlapic *vlapic;
- u32 vlapic_lvtpc;
- unsigned char int_vec;
-
- ASSERT( is_hvm_vcpu(v) );
-
- vlapic = vcpu_vlapic(v);
- if ( !is_vlapic_lvtpc_enabled(vlapic) )
- return;
-
- vlapic_lvtpc = vlapic_get_reg(vlapic, APIC_LVTPC);
- int_vec = vlapic_lvtpc & APIC_VECTOR_MASK;
-
- if ( GET_APIC_DELIVERY_MODE(vlapic_lvtpc) == APIC_MODE_FIXED )
- vlapic_set_irq(vcpu_vlapic(v), int_vec, 0);
- else
- v->nmi_pending = 1;
-}
-
-int vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
-{
- struct vpmu_struct *vpmu = vcpu_vpmu(current);
-
- if ( (vpmu_mode == XENPMU_MODE_OFF) ||
- ((vpmu_mode & XENPMU_MODE_PRIV) && !is_control_domain(current->domain)) )
- return 0;
-
- if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->do_wrmsr )
- {
- int ret = vpmu->arch_vpmu_ops->do_wrmsr(msr, msr_content);
-
- /*
- * We may have received a PMU interrupt during WRMSR handling
- * and since do_wrmsr may load VPMU context we should save
- * (and unload) it again.
- */
- if ( !has_hvm_container_domain(current->domain) &&
- (current->arch.vpmu.xenpmu_data->pmu_flags & PMU_CACHED) )
- {
- vpmu_set(vpmu, VPMU_CONTEXT_SAVE);
- vpmu->arch_vpmu_ops->arch_vpmu_save(current);
- vpmu_reset(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED);
- }
- return ret;
- }
- return 0;
-}
-
-int vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content)
-{
- struct vpmu_struct *vpmu = vcpu_vpmu(current);
-
- if ( (vpmu_mode == XENPMU_MODE_OFF) ||
- ((vpmu_mode & XENPMU_MODE_PRIV) && !is_control_domain(current->domain)) )
- return 0;
-
- if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->do_rdmsr )
- {
- int ret = vpmu->arch_vpmu_ops->do_rdmsr(msr, msr_content);
-
- if ( !has_hvm_container_domain(current->domain) &&
- (current->arch.vpmu.xenpmu_data->pmu_flags & PMU_CACHED) )
- {
- vpmu_set(vpmu, VPMU_CONTEXT_SAVE);
- vpmu->arch_vpmu_ops->arch_vpmu_save(current);
- vpmu_reset(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED);
- }
- return ret;
- }
- return 0;
-}
-
-/* This routine may be called in NMI context */
-int vpmu_do_interrupt(struct cpu_user_regs *regs)
-{
- struct vcpu *v = current;
- struct vpmu_struct *vpmu;
-
- /* dom0 will handle this interrupt */
- if ( (vpmu_mode & XENPMU_MODE_PRIV) ||
- (v->domain->domain_id >= DOMID_FIRST_RESERVED) )
- v = dom0->vcpu[smp_processor_id() % dom0->max_vcpus];
-
- vpmu = vcpu_vpmu(v);
- if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
- return 0;
-
- if ( !is_hvm_domain(v->domain) || (vpmu_mode & XENPMU_MODE_PRIV) )
- {
- /* PV(H) guest or dom0 is doing system profiling */
- struct cpu_user_regs *gregs;
- int err;
-
- if ( v->arch.vpmu.xenpmu_data->pmu_flags & PMU_CACHED )
- return 1;
-
- if ( is_pvh_domain(current->domain) && !(vpmu_mode & XENPMU_MODE_PRIV) &&
- !vpmu->arch_vpmu_ops->do_interrupt(regs) )
- return 0;
-
- /* PV guest will be reading PMU MSRs from xenpmu_data */
- vpmu_set(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED);
- err = vpmu->arch_vpmu_ops->arch_vpmu_save(v);
- vpmu_reset(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED);
-
- if ( !is_hvm_domain(current->domain) )
- {
- /* Store appropriate registers in xenpmu_data */
- if ( is_pv_32bit_domain(current->domain) )
- {
- gregs = guest_cpu_user_regs();
-
- if ( (vpmu_mode & XENPMU_MODE_PRIV) &&
- !is_pv_32bit_domain(v->domain) )
- memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
- gregs, sizeof(struct cpu_user_regs));
- else
- {
- /*
- * 32-bit dom0 cannot process Xen's addresses (which are
- * 64 bit) and therefore we treat it the same way as a
- * non-priviledged PV 32-bit domain.
- */
-
- struct compat_cpu_user_regs *cmp;
-
- cmp = (struct compat_cpu_user_regs *)
- &v->arch.vpmu.xenpmu_data->pmu.r.regs;
- XLAT_cpu_user_regs(cmp, gregs);
- memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
- &cmp, sizeof(struct compat_cpu_user_regs));
- }
- }
- else if ( !is_control_domain(current->domain) &&
- !is_idle_vcpu(current) )
- {
- /* PV(H) guest */
- gregs = guest_cpu_user_regs();
- memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
- gregs, sizeof(struct cpu_user_regs));
- }
- else
- memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
- regs, sizeof(struct cpu_user_regs));
-
- gregs = &v->arch.vpmu.xenpmu_data->pmu.r.regs;
- if ( !is_pvh_domain(current->domain) )
- gregs->cs = (current->arch.flags & TF_kernel_mode) ? 0 : 0x3;
- else if ( !(vpmu_interrupt_type & APIC_DM_NMI) )
- {
- struct segment_register seg_cs;
-
- hvm_get_segment_register(current, x86_seg_cs, &seg_cs);
- gregs->cs = seg_cs.attr.fields.dpl;
- }
- }
- else
- {
- /* HVM guest */
- struct segment_register cs;
-
- gregs = guest_cpu_user_regs();
- memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
- gregs, sizeof(struct cpu_user_regs));
-
- /* This is unsafe in NMI context, we'll do it in softint handler */
- if ( !(vpmu_interrupt_type & APIC_DM_NMI ) )
- {
- hvm_get_segment_register(current, x86_seg_cs, &cs);
- gregs = &v->arch.vpmu.xenpmu_data->pmu.r.regs;
- gregs->cs = cs.attr.fields.dpl;
- }
- }
-
- v->arch.vpmu.xenpmu_data->domain_id = current->domain->domain_id;
- v->arch.vpmu.xenpmu_data->vcpu_id = current->vcpu_id;
- v->arch.vpmu.xenpmu_data->pcpu_id = smp_processor_id();
-
- if ( !is_pvh_domain(current->domain) || (vpmu_mode & XENPMU_MODE_PRIV) )
- v->arch.vpmu.xenpmu_data->pmu_flags |= PMU_CACHED;
- apic_write(APIC_LVTPC, vpmu->hw_lapic_lvtpc | APIC_LVT_MASKED);
- vpmu->hw_lapic_lvtpc |= APIC_LVT_MASKED;
-
- if ( vpmu_interrupt_type & APIC_DM_NMI )
- {
- per_cpu(sampled_vcpu, smp_processor_id()) = current;
- raise_softirq(PMU_SOFTIRQ);
- }
- else
- send_guest_vcpu_virq(v, VIRQ_XENPMU);
-
- return 1;
- }
-
- if ( vpmu->arch_vpmu_ops )
- {
- if ( !vpmu->arch_vpmu_ops->do_interrupt(regs) )
- return 0;
-
- if ( vpmu_interrupt_type & APIC_DM_NMI )
- {
- per_cpu(sampled_vcpu, smp_processor_id()) = current;
- raise_softirq(PMU_SOFTIRQ);
- }
- else
- vpmu_send_nmi(v);
-
- return 1;
- }
-
- return 0;
-}
-
-void vpmu_do_cpuid(unsigned int input,
- unsigned int *eax, unsigned int *ebx,
- unsigned int *ecx, unsigned int *edx)
-{
- struct vpmu_struct *vpmu = vcpu_vpmu(current);
-
- if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->do_cpuid )
- vpmu->arch_vpmu_ops->do_cpuid(input, eax, ebx, ecx, edx);
-}
-
-static void vpmu_save_force(void *arg)
-{
- struct vcpu *v = (struct vcpu *)arg;
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
-
- if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
- return;
-
- if ( vpmu->arch_vpmu_ops )
- (void)vpmu->arch_vpmu_ops->arch_vpmu_save(v);
-
- vpmu_reset(vpmu, VPMU_CONTEXT_SAVE);
-
- per_cpu(last_vcpu, smp_processor_id()) = NULL;
-}
-
-void vpmu_save(struct vcpu *v)
-{
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
- int pcpu = smp_processor_id();
-
- if ( !vpmu_is_set_all(vpmu, VPMU_CONTEXT_ALLOCATED | VPMU_CONTEXT_LOADED) )
- return;
-
- vpmu->last_pcpu = pcpu;
- per_cpu(last_vcpu, pcpu) = v;
-
- if ( vpmu->arch_vpmu_ops )
- if ( vpmu->arch_vpmu_ops->arch_vpmu_save(v) )
- vpmu_reset(vpmu, VPMU_CONTEXT_LOADED);
-
- apic_write(APIC_LVTPC, vpmu_interrupt_type | APIC_LVT_MASKED);
-}
-
-void vpmu_load(struct vcpu *v)
-{
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
- int pcpu = smp_processor_id();
- struct vcpu *prev = NULL;
-
- if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
- return;
-
- /* First time this VCPU is running here */
- if ( vpmu->last_pcpu != pcpu )
- {
- /*
- * Get the context from last pcpu that we ran on. Note that if another
- * VCPU is running there it must have saved this VPCU's context before
- * startig to run (see below).
- * There should be no race since remote pcpu will disable interrupts
- * before saving the context.
- */
- if ( vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
- {
- vpmu_set(vpmu, VPMU_CONTEXT_SAVE);
- on_selected_cpus(cpumask_of(vpmu->last_pcpu),
- vpmu_save_force, (void *)v, 1);
- vpmu_reset(vpmu, VPMU_CONTEXT_LOADED);
- }
- }
-
- /* Prevent forced context save from remote CPU */
- local_irq_disable();
-
- prev = per_cpu(last_vcpu, pcpu);
-
- if ( prev != v && prev )
- {
- vpmu = vcpu_vpmu(prev);
-
- /* Someone ran here before us */
- vpmu_set(vpmu, VPMU_CONTEXT_SAVE);
- vpmu_save_force(prev);
- vpmu_reset(vpmu, VPMU_CONTEXT_LOADED);
-
- vpmu = vcpu_vpmu(v);
- }
-
- local_irq_enable();
-
- /* Only when PMU is counting, we load PMU context immediately. */
- if ( !vpmu_is_set(vpmu, VPMU_RUNNING) ||
- (!has_hvm_container_domain(v->domain) && vpmu->xenpmu_data->pmu_flags & PMU_CACHED) )
- return;
-
- if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->arch_vpmu_load )
- {
- apic_write_around(APIC_LVTPC, vpmu->hw_lapic_lvtpc);
- /* Arch code needs to set VPMU_CONTEXT_LOADED */
- vpmu->arch_vpmu_ops->arch_vpmu_load(v);
- }
-}
-
-void vpmu_initialise(struct vcpu *v)
-{
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
- uint8_t vendor = current_cpu_data.x86_vendor;
-
- if ( vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
- vpmu_destroy(v);
- vpmu_clear(vpmu);
- vpmu->context = NULL;
-
- switch ( vendor )
- {
- case X86_VENDOR_AMD:
- if ( svm_vpmu_initialise(v) != 0 )
- vpmu_mode = XENPMU_MODE_OFF;
- return;
-
- case X86_VENDOR_INTEL:
- if ( vmx_vpmu_initialise(v) != 0 )
- vpmu_mode = XENPMU_MODE_OFF;
- return;
-
- default:
- printk("VPMU: Initialization failed. "
- "Unknown CPU vendor %d\n", vendor);
- vpmu_mode = XENPMU_MODE_OFF;
- return;
- }
-}
-
-void vpmu_destroy(struct vcpu *v)
-{
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
-
- if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->arch_vpmu_destroy )
- {
- /* Unload VPMU first. This will stop counters */
- on_selected_cpus(cpumask_of(vcpu_vpmu(v)->last_pcpu),
- vpmu_save_force, (void *)v, 1);
-
- vpmu->arch_vpmu_ops->arch_vpmu_destroy(v);
- }
-}
-
-/* Dump some vpmu informations on console. Used in keyhandler dump_domains(). */
-void vpmu_dump(struct vcpu *v)
-{
- struct vpmu_struct *vpmu = vcpu_vpmu(v);
-
- if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->arch_vpmu_dump )
- vpmu->arch_vpmu_ops->arch_vpmu_dump(v);
-}
-
-/* Unload VPMU contexts */
-static void vpmu_unload_all(void)
-{
- struct domain *d;
- struct vcpu *v;
- struct vpmu_struct *vpmu;
-
- for_each_domain(d)
- {
- for_each_vcpu ( d, v )
- {
- if ( v != current )
- vcpu_pause(v);
- vpmu = vcpu_vpmu(v);
-
- if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
- {
- if ( v != current )
- vcpu_unpause(v);
- continue;
- }
-
- vpmu_set(vpmu, VPMU_CONTEXT_SAVE);
- on_selected_cpus(cpumask_of(vpmu->last_pcpu),
- vpmu_save_force, (void *)v, 1);
- vpmu_reset(vpmu, VPMU_CONTEXT_LOADED);
-
- if ( v != current )
- vcpu_unpause(v);
- }
- }
-}
-
-/* Process the softirq set by PMU NMI handler */
-static void pmu_softnmi(void)
-{
- struct cpu_user_regs *regs;
- struct vcpu *v, *sampled = per_cpu(sampled_vcpu, smp_processor_id());
-
- if ( (vpmu_mode & XENPMU_MODE_PRIV) ||
- (sampled->domain->domain_id >= DOMID_FIRST_RESERVED) )
- v = dom0->vcpu[smp_processor_id() % dom0->max_vcpus];
- else
- {
- if ( is_hvm_domain(sampled->domain) )
- {
- vpmu_send_nmi(sampled);
- return;
- }
- v = sampled;
- }
-
- regs = &v->arch.vpmu.xenpmu_data->pmu.r.regs;
- if ( has_hvm_container_domain(sampled->domain) )
- {
- struct segment_register cs;
-
- hvm_get_segment_register(sampled, x86_seg_cs, &cs);
- regs->cs = cs.attr.fields.dpl;
- }
-
- send_guest_vcpu_virq(v, VIRQ_XENPMU);
-}
-
-int pmu_nmi_interrupt(struct cpu_user_regs *regs, int cpu)
-{
- return vpmu_do_interrupt(regs);
-}
-
-static int pvpmu_init(struct domain *d, xen_pmu_params_t *params)
-{
- struct vcpu *v;
- struct page_info *page;
- uint64_t gfn = params->d.val;
- static bool_t __read_mostly pvpmu_initted = 0;
-
- if ( params->vcpu < 0 || params->vcpu >= d->max_vcpus )
- return -EINVAL;
-
- page = get_page_from_gfn(d, gfn, NULL, P2M_ALLOC);
- if ( !page )
- return -EINVAL;
-
- if ( !get_page_type(page, PGT_writable_page) )
- {
- put_page(page);
- return -EINVAL;
- }
-
- v = d->vcpu[params->vcpu];
- v->arch.vpmu.xenpmu_data = __map_domain_page_global(page);
- if ( !v->arch.vpmu.xenpmu_data )
- {
- put_page_and_type(page);
- return -EINVAL;
- }
-
- if ( !pvpmu_initted )
- {
- if (reserve_lapic_nmi() == 0)
- set_nmi_callback(pmu_nmi_interrupt);
- else
- {
- printk("Failed to reserve PMU NMI\n");
- put_page(page);
- return -EBUSY;
- }
- open_softirq(PMU_SOFTIRQ, pmu_softnmi);
-
- pvpmu_initted = 1;
- }
-
- vpmu_initialise(v);
-
- return 0;
-}
-
-static void pvpmu_finish(struct domain *d, xen_pmu_params_t *params)
-{
- struct vcpu *v;
- uint64_t mfn;
-
- if ( params->vcpu < 0 || params->vcpu >= d->max_vcpus )
- return;
-
- v = d->vcpu[params->vcpu];
- if (v != current)
- vcpu_pause(v);
-
- if ( v->arch.vpmu.xenpmu_data )
- {
- mfn = domain_page_map_to_mfn(v->arch.vpmu.xenpmu_data);
- if ( mfn_valid(mfn) )
- {
- unmap_domain_page_global(v->arch.vpmu.xenpmu_data);
- put_page_and_type(mfn_to_page(mfn));
- }
- }
- vpmu_destroy(v);
-
- if (v != current)
- vcpu_unpause(v);
-}
-
-long do_xenpmu_op(int op, XEN_GUEST_HANDLE_PARAM(xen_pmu_params_t) arg)
-{
- int ret = -EINVAL;
- xen_pmu_params_t pmu_params;
-
- switch ( op )
- {
- case XENPMU_mode_set:
- if ( !is_control_domain(current->domain) )
- return -EPERM;
-
- if ( copy_from_guest(&pmu_params, arg, 1) )
- return -EFAULT;
-
- if ( (pmu_params.d.val & ~(XENPMU_MODE_ON | XENPMU_MODE_PRIV)) ||
- ((pmu_params.d.val & XENPMU_MODE_ON) &&
- (pmu_params.d.val & XENPMU_MODE_PRIV)) )
- return -EINVAL;
-
- vpmu_mode = pmu_params.d.val;
-
- if ( (vpmu_mode == XENPMU_MODE_OFF) || (vpmu_mode & XENPMU_MODE_PRIV) )
- /*
- * After this VPMU context will never be loaded during context
- * switch. Because PMU MSR accesses load VPMU context we don't
- * allow them when VPMU is off and, for non-provileged domains,
- * when we are in privileged mode. (We do want these accesses to
- * load VPMU context for control domain in this mode)
- */
- vpmu_unload_all();
-
- ret = 0;
- break;
-
- case XENPMU_mode_get:
- pmu_params.d.val = vpmu_mode;
- pmu_params.v.version.maj = XENPMU_VER_MAJ;
- pmu_params.v.version.min = XENPMU_VER_MIN;
- if ( copy_to_guest(arg, &pmu_params, 1) )
- return -EFAULT;
- ret = 0;
- break;
-
- case XENPMU_feature_set:
- if ( !is_control_domain(current->domain) )
- return -EPERM;
-
- if ( copy_from_guest(&pmu_params, arg, 1) )
- return -EFAULT;
-
- if ( pmu_params.d.val & ~XENPMU_FEATURE_INTEL_BTS )
- return -EINVAL;
-
- vpmu_features = pmu_params.d.val;
-
- ret = 0;
- break;
-
- case XENPMU_feature_get:
- pmu_params.d.val = vpmu_mode;
- if ( copy_to_guest(arg, &pmu_params, 1) )
- return -EFAULT;
- ret = 0;
- break;
-
- case XENPMU_init:
- if ( copy_from_guest(&pmu_params, arg, 1) )
- return -EFAULT;
- ret = pvpmu_init(current->domain, &pmu_params);
- break;
-
- case XENPMU_finish:
- if ( copy_from_guest(&pmu_params, arg, 1) )
- return -EFAULT;
- pvpmu_finish(current->domain, &pmu_params);
- break;
-
- case XENPMU_lvtpc_set:
- if ( current->arch.vpmu.xenpmu_data == NULL )
- return -EINVAL;
- vpmu_lvtpc_update(current->arch.vpmu.xenpmu_data->pmu.l.lapic_lvtpc);
- ret = 0;
- break;
- case XENPMU_flush:
- current->arch.vpmu.xenpmu_data->pmu_flags &= ~PMU_CACHED;
- vpmu_lvtpc_update(current->arch.vpmu.xenpmu_data->pmu.l.lapic_lvtpc);
- vpmu_load(current);
- ret = 0;
- break;
- }
-
- return ret;
-}
diff --git a/xen/arch/x86/oprofile/op_model_ppro.c b/xen/arch/x86/oprofile/op_model_ppro.c
index 5aae2e7..bf5d9a5 100644
--- a/xen/arch/x86/oprofile/op_model_ppro.c
+++ b/xen/arch/x86/oprofile/op_model_ppro.c
@@ -19,7 +19,7 @@
#include <asm/processor.h>
#include <asm/regs.h>
#include <asm/current.h>
-#include <asm/hvm/vpmu.h>
+#include <asm/vpmu.h>
#include "op_x86_model.h"
#include "op_counter.h"
diff --git a/xen/arch/x86/traps.c b/xen/arch/x86/traps.c
index 83ea479..7fb1d30 100644
--- a/xen/arch/x86/traps.c
+++ b/xen/arch/x86/traps.c
@@ -72,7 +72,7 @@
#include <asm/apic.h>
#include <asm/mc146818rtc.h>
#include <asm/hpet.h>
-#include <asm/hvm/vpmu.h>
+#include <asm/vpmu.h>
#include <public/arch-x86/cpuid.h>
#include <xsm/xsm.h>
diff --git a/xen/arch/x86/vpmu.c b/xen/arch/x86/vpmu.c
new file mode 100644
index 0000000..8c2723b
--- /dev/null
+++ b/xen/arch/x86/vpmu.c
@@ -0,0 +1,720 @@
+/*
+ * vpmu.c: PMU virtualization for HVM domain.
+ *
+ * Copyright (c) 2007, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Author: Haitao Shan <haitao.shan@intel.com>
+ */
+#include <xen/config.h>
+#include <xen/sched.h>
+#include <xen/xenoprof.h>
+#include <xen/event.h>
+#include <xen/softirq.h>
+#include <xen/hypercall.h>
+#include <xen/guest_access.h>
+#include <asm/regs.h>
+#include <asm/types.h>
+#include <asm/msr.h>
+#include <asm/p2m.h>
+#include <asm/hvm/support.h>
+#include <asm/hvm/vmx/vmx.h>
+#include <asm/hvm/vmx/vmcs.h>
+#include <asm/vpmu.h>
+#include <asm/hvm/svm/svm.h>
+#include <asm/hvm/svm/vmcb.h>
+#include <asm/apic.h>
+#include <asm/nmi.h>
+#include <public/pmu.h>
+
+/*
+ * "vpmu" : vpmu generally enabled
+ * "vpmu=off" : vpmu generally disabled
+ * "vpmu=bts" : vpmu enabled and Intel BTS feature switched on.
+ */
+uint64_t __read_mostly vpmu_mode = XENPMU_MODE_OFF;
+uint64_t __read_mostly vpmu_features = 0;
+static void parse_vpmu_param(char *s);
+custom_param("vpmu", parse_vpmu_param);
+
+static DEFINE_PER_CPU(struct vcpu *, last_vcpu);
+static DEFINE_PER_CPU(struct vcpu *, sampled_vcpu);
+
+static uint32_t __read_mostly vpmu_interrupt_type = PMU_APIC_VECTOR;
+
+static void __init parse_vpmu_param(char *s)
+{
+ char *ss;
+
+ vpmu_mode = XENPMU_MODE_ON;
+ if (*s == '\0')
+ return;
+
+ do {
+ ss = strchr(s, ',');
+ if ( ss )
+ *ss = '\0';
+
+ switch ( parse_bool(s) )
+ {
+ case 0:
+ vpmu_mode = XENPMU_MODE_OFF;
+ return;
+ case -1:
+ if ( !strcmp(s, "nmi") )
+ vpmu_interrupt_type = APIC_DM_NMI;
+ else if ( !strcmp(s, "bts") )
+ vpmu_features |= XENPMU_FEATURE_INTEL_BTS;
+ else if ( !strcmp(s, "priv") )
+ {
+ vpmu_mode &= ~XENPMU_MODE_ON;
+ vpmu_mode |= XENPMU_MODE_PRIV;
+ }
+ else
+ {
+ printk("VPMU: unknown flag: %s - vpmu disabled!\n", s);
+ vpmu_mode = XENPMU_MODE_OFF;
+ return;
+ }
+ default:
+ break;
+ }
+
+ s = ss + 1;
+ } while ( ss );
+}
+
+void vpmu_lvtpc_update(uint32_t val)
+{
+ struct vpmu_struct *vpmu = vcpu_vpmu(current);
+
+ vpmu->hw_lapic_lvtpc = vpmu_interrupt_type | (val & APIC_LVT_MASKED);
+
+ /* Postpone APIC updates for PV guests if PMU interrupt is pending */
+ if ( !has_hvm_container_domain(current->domain) ||
+ !(current->arch.vpmu.xenpmu_data &&
+ current->arch.vpmu.xenpmu_data->pmu_flags & PMU_CACHED) )
+ apic_write(APIC_LVTPC, vpmu->hw_lapic_lvtpc);
+}
+
+static void vpmu_send_nmi(struct vcpu *v)
+{
+ struct vlapic *vlapic;
+ u32 vlapic_lvtpc;
+ unsigned char int_vec;
+
+ ASSERT( is_hvm_vcpu(v) );
+
+ vlapic = vcpu_vlapic(v);
+ if ( !is_vlapic_lvtpc_enabled(vlapic) )
+ return;
+
+ vlapic_lvtpc = vlapic_get_reg(vlapic, APIC_LVTPC);
+ int_vec = vlapic_lvtpc & APIC_VECTOR_MASK;
+
+ if ( GET_APIC_DELIVERY_MODE(vlapic_lvtpc) == APIC_MODE_FIXED )
+ vlapic_set_irq(vcpu_vlapic(v), int_vec, 0);
+ else
+ v->nmi_pending = 1;
+}
+
+int vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
+{
+ struct vpmu_struct *vpmu = vcpu_vpmu(current);
+
+ if ( (vpmu_mode == XENPMU_MODE_OFF) ||
+ ((vpmu_mode & XENPMU_MODE_PRIV) && !is_control_domain(current->domain)) )
+ return 0;
+
+ if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->do_wrmsr )
+ {
+ int ret = vpmu->arch_vpmu_ops->do_wrmsr(msr, msr_content);
+
+ /*
+ * We may have received a PMU interrupt during WRMSR handling
+ * and since do_wrmsr may load VPMU context we should save
+ * (and unload) it again.
+ */
+ if ( !has_hvm_container_domain(current->domain) &&
+ (current->arch.vpmu.xenpmu_data->pmu_flags & PMU_CACHED) )
+ {
+ vpmu_set(vpmu, VPMU_CONTEXT_SAVE);
+ vpmu->arch_vpmu_ops->arch_vpmu_save(current);
+ vpmu_reset(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED);
+ }
+ return ret;
+ }
+ return 0;
+}
+
+int vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content)
+{
+ struct vpmu_struct *vpmu = vcpu_vpmu(current);
+
+ if ( (vpmu_mode == XENPMU_MODE_OFF) ||
+ ((vpmu_mode & XENPMU_MODE_PRIV) && !is_control_domain(current->domain)) )
+ return 0;
+
+ if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->do_rdmsr )
+ {
+ int ret = vpmu->arch_vpmu_ops->do_rdmsr(msr, msr_content);
+
+ if ( !has_hvm_container_domain(current->domain) &&
+ (current->arch.vpmu.xenpmu_data->pmu_flags & PMU_CACHED) )
+ {
+ vpmu_set(vpmu, VPMU_CONTEXT_SAVE);
+ vpmu->arch_vpmu_ops->arch_vpmu_save(current);
+ vpmu_reset(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED);
+ }
+ return ret;
+ }
+ return 0;
+}
+
+/* This routine may be called in NMI context */
+int vpmu_do_interrupt(struct cpu_user_regs *regs)
+{
+ struct vcpu *v = current;
+ struct vpmu_struct *vpmu;
+
+ /* dom0 will handle this interrupt */
+ if ( (vpmu_mode & XENPMU_MODE_PRIV) ||
+ (v->domain->domain_id >= DOMID_FIRST_RESERVED) )
+ v = dom0->vcpu[smp_processor_id() % dom0->max_vcpus];
+
+ vpmu = vcpu_vpmu(v);
+ if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
+ return 0;
+
+ if ( !is_hvm_domain(v->domain) || (vpmu_mode & XENPMU_MODE_PRIV) )
+ {
+ /* PV(H) guest or dom0 is doing system profiling */
+ struct cpu_user_regs *gregs;
+ int err;
+
+ if ( v->arch.vpmu.xenpmu_data->pmu_flags & PMU_CACHED )
+ return 1;
+
+ if ( is_pvh_domain(current->domain) && !(vpmu_mode & XENPMU_MODE_PRIV) &&
+ !vpmu->arch_vpmu_ops->do_interrupt(regs) )
+ return 0;
+
+ /* PV guest will be reading PMU MSRs from xenpmu_data */
+ vpmu_set(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED);
+ err = vpmu->arch_vpmu_ops->arch_vpmu_save(v);
+ vpmu_reset(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED);
+
+ if ( !is_hvm_domain(current->domain) )
+ {
+ /* Store appropriate registers in xenpmu_data */
+ if ( is_pv_32bit_domain(current->domain) )
+ {
+ gregs = guest_cpu_user_regs();
+
+ if ( (vpmu_mode & XENPMU_MODE_PRIV) &&
+ !is_pv_32bit_domain(v->domain) )
+ memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
+ gregs, sizeof(struct cpu_user_regs));
+ else
+ {
+ /*
+ * 32-bit dom0 cannot process Xen's addresses (which are
+ * 64 bit) and therefore we treat it the same way as a
+ * non-priviledged PV 32-bit domain.
+ */
+
+ struct compat_cpu_user_regs *cmp;
+
+ cmp = (struct compat_cpu_user_regs *)
+ &v->arch.vpmu.xenpmu_data->pmu.r.regs;
+ XLAT_cpu_user_regs(cmp, gregs);
+ memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
+ &cmp, sizeof(struct compat_cpu_user_regs));
+ }
+ }
+ else if ( !is_control_domain(current->domain) &&
+ !is_idle_vcpu(current) )
+ {
+ /* PV(H) guest */
+ gregs = guest_cpu_user_regs();
+ memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
+ gregs, sizeof(struct cpu_user_regs));
+ }
+ else
+ memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
+ regs, sizeof(struct cpu_user_regs));
+
+ gregs = &v->arch.vpmu.xenpmu_data->pmu.r.regs;
+ if ( !is_pvh_domain(current->domain) )
+ gregs->cs = (current->arch.flags & TF_kernel_mode) ? 0 : 0x3;
+ else if ( !(vpmu_interrupt_type & APIC_DM_NMI) )
+ {
+ struct segment_register seg_cs;
+
+ hvm_get_segment_register(current, x86_seg_cs, &seg_cs);
+ gregs->cs = seg_cs.attr.fields.dpl;
+ }
+ }
+ else
+ {
+ /* HVM guest */
+ struct segment_register cs;
+
+ gregs = guest_cpu_user_regs();
+ memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
+ gregs, sizeof(struct cpu_user_regs));
+
+ /* This is unsafe in NMI context, we'll do it in softint handler */
+ if ( !(vpmu_interrupt_type & APIC_DM_NMI ) )
+ {
+ hvm_get_segment_register(current, x86_seg_cs, &cs);
+ gregs = &v->arch.vpmu.xenpmu_data->pmu.r.regs;
+ gregs->cs = cs.attr.fields.dpl;
+ }
+ }
+
+ v->arch.vpmu.xenpmu_data->domain_id = current->domain->domain_id;
+ v->arch.vpmu.xenpmu_data->vcpu_id = current->vcpu_id;
+ v->arch.vpmu.xenpmu_data->pcpu_id = smp_processor_id();
+
+ if ( !is_pvh_domain(current->domain) || (vpmu_mode & XENPMU_MODE_PRIV) )
+ v->arch.vpmu.xenpmu_data->pmu_flags |= PMU_CACHED;
+ apic_write(APIC_LVTPC, vpmu->hw_lapic_lvtpc | APIC_LVT_MASKED);
+ vpmu->hw_lapic_lvtpc |= APIC_LVT_MASKED;
+
+ if ( vpmu_interrupt_type & APIC_DM_NMI )
+ {
+ per_cpu(sampled_vcpu, smp_processor_id()) = current;
+ raise_softirq(PMU_SOFTIRQ);
+ }
+ else
+ send_guest_vcpu_virq(v, VIRQ_XENPMU);
+
+ return 1;
+ }
+
+ if ( vpmu->arch_vpmu_ops )
+ {
+ if ( !vpmu->arch_vpmu_ops->do_interrupt(regs) )
+ return 0;
+
+ if ( vpmu_interrupt_type & APIC_DM_NMI )
+ {
+ per_cpu(sampled_vcpu, smp_processor_id()) = current;
+ raise_softirq(PMU_SOFTIRQ);
+ }
+ else
+ vpmu_send_nmi(v);
+
+ return 1;
+ }
+
+ return 0;
+}
+
+void vpmu_do_cpuid(unsigned int input,
+ unsigned int *eax, unsigned int *ebx,
+ unsigned int *ecx, unsigned int *edx)
+{
+ struct vpmu_struct *vpmu = vcpu_vpmu(current);
+
+ if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->do_cpuid )
+ vpmu->arch_vpmu_ops->do_cpuid(input, eax, ebx, ecx, edx);
+}
+
+static void vpmu_save_force(void *arg)
+{
+ struct vcpu *v = (struct vcpu *)arg;
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+
+ if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
+ return;
+
+ if ( vpmu->arch_vpmu_ops )
+ (void)vpmu->arch_vpmu_ops->arch_vpmu_save(v);
+
+ vpmu_reset(vpmu, VPMU_CONTEXT_SAVE);
+
+ per_cpu(last_vcpu, smp_processor_id()) = NULL;
+}
+
+void vpmu_save(struct vcpu *v)
+{
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ int pcpu = smp_processor_id();
+
+ if ( !vpmu_is_set_all(vpmu, VPMU_CONTEXT_ALLOCATED | VPMU_CONTEXT_LOADED) )
+ return;
+
+ vpmu->last_pcpu = pcpu;
+ per_cpu(last_vcpu, pcpu) = v;
+
+ if ( vpmu->arch_vpmu_ops )
+ if ( vpmu->arch_vpmu_ops->arch_vpmu_save(v) )
+ vpmu_reset(vpmu, VPMU_CONTEXT_LOADED);
+
+ apic_write(APIC_LVTPC, vpmu_interrupt_type | APIC_LVT_MASKED);
+}
+
+void vpmu_load(struct vcpu *v)
+{
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ int pcpu = smp_processor_id();
+ struct vcpu *prev = NULL;
+
+ if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
+ return;
+
+ /* First time this VCPU is running here */
+ if ( vpmu->last_pcpu != pcpu )
+ {
+ /*
+ * Get the context from last pcpu that we ran on. Note that if another
+ * VCPU is running there it must have saved this VPCU's context before
+ * startig to run (see below).
+ * There should be no race since remote pcpu will disable interrupts
+ * before saving the context.
+ */
+ if ( vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
+ {
+ vpmu_set(vpmu, VPMU_CONTEXT_SAVE);
+ on_selected_cpus(cpumask_of(vpmu->last_pcpu),
+ vpmu_save_force, (void *)v, 1);
+ vpmu_reset(vpmu, VPMU_CONTEXT_LOADED);
+ }
+ }
+
+ /* Prevent forced context save from remote CPU */
+ local_irq_disable();
+
+ prev = per_cpu(last_vcpu, pcpu);
+
+ if ( prev != v && prev )
+ {
+ vpmu = vcpu_vpmu(prev);
+
+ /* Someone ran here before us */
+ vpmu_set(vpmu, VPMU_CONTEXT_SAVE);
+ vpmu_save_force(prev);
+ vpmu_reset(vpmu, VPMU_CONTEXT_LOADED);
+
+ vpmu = vcpu_vpmu(v);
+ }
+
+ local_irq_enable();
+
+ /* Only when PMU is counting, we load PMU context immediately. */
+ if ( !vpmu_is_set(vpmu, VPMU_RUNNING) ||
+ (!has_hvm_container_domain(v->domain) && vpmu->xenpmu_data->pmu_flags & PMU_CACHED) )
+ return;
+
+ if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->arch_vpmu_load )
+ {
+ apic_write_around(APIC_LVTPC, vpmu->hw_lapic_lvtpc);
+ /* Arch code needs to set VPMU_CONTEXT_LOADED */
+ vpmu->arch_vpmu_ops->arch_vpmu_load(v);
+ }
+}
+
+void vpmu_initialise(struct vcpu *v)
+{
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ uint8_t vendor = current_cpu_data.x86_vendor;
+
+ if ( vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
+ vpmu_destroy(v);
+ vpmu_clear(vpmu);
+ vpmu->context = NULL;
+
+ switch ( vendor )
+ {
+ case X86_VENDOR_AMD:
+ if ( svm_vpmu_initialise(v) != 0 )
+ vpmu_mode = XENPMU_MODE_OFF;
+ return;
+
+ case X86_VENDOR_INTEL:
+ if ( vmx_vpmu_initialise(v) != 0 )
+ vpmu_mode = XENPMU_MODE_OFF;
+ return;
+
+ default:
+ printk("VPMU: Initialization failed. "
+ "Unknown CPU vendor %d\n", vendor);
+ vpmu_mode = XENPMU_MODE_OFF;
+ return;
+ }
+}
+
+void vpmu_destroy(struct vcpu *v)
+{
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+
+ if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->arch_vpmu_destroy )
+ {
+ /* Unload VPMU first. This will stop counters */
+ on_selected_cpus(cpumask_of(vcpu_vpmu(v)->last_pcpu),
+ vpmu_save_force, (void *)v, 1);
+
+ vpmu->arch_vpmu_ops->arch_vpmu_destroy(v);
+ }
+}
+
+/* Dump some vpmu informations on console. Used in keyhandler dump_domains(). */
+void vpmu_dump(struct vcpu *v)
+{
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+
+ if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->arch_vpmu_dump )
+ vpmu->arch_vpmu_ops->arch_vpmu_dump(v);
+}
+
+/* Unload VPMU contexts */
+static void vpmu_unload_all(void)
+{
+ struct domain *d;
+ struct vcpu *v;
+ struct vpmu_struct *vpmu;
+
+ for_each_domain(d)
+ {
+ for_each_vcpu ( d, v )
+ {
+ if ( v != current )
+ vcpu_pause(v);
+ vpmu = vcpu_vpmu(v);
+
+ if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
+ {
+ if ( v != current )
+ vcpu_unpause(v);
+ continue;
+ }
+
+ vpmu_set(vpmu, VPMU_CONTEXT_SAVE);
+ on_selected_cpus(cpumask_of(vpmu->last_pcpu),
+ vpmu_save_force, (void *)v, 1);
+ vpmu_reset(vpmu, VPMU_CONTEXT_LOADED);
+
+ if ( v != current )
+ vcpu_unpause(v);
+ }
+ }
+}
+
+/* Process the softirq set by PMU NMI handler */
+static void pmu_softnmi(void)
+{
+ struct cpu_user_regs *regs;
+ struct vcpu *v, *sampled = per_cpu(sampled_vcpu, smp_processor_id());
+
+ if ( (vpmu_mode & XENPMU_MODE_PRIV) ||
+ (sampled->domain->domain_id >= DOMID_FIRST_RESERVED) )
+ v = dom0->vcpu[smp_processor_id() % dom0->max_vcpus];
+ else
+ {
+ if ( is_hvm_domain(sampled->domain) )
+ {
+ vpmu_send_nmi(sampled);
+ return;
+ }
+ v = sampled;
+ }
+
+ regs = &v->arch.vpmu.xenpmu_data->pmu.r.regs;
+ if ( has_hvm_container_domain(sampled->domain) )
+ {
+ struct segment_register cs;
+
+ hvm_get_segment_register(sampled, x86_seg_cs, &cs);
+ regs->cs = cs.attr.fields.dpl;
+ }
+
+ send_guest_vcpu_virq(v, VIRQ_XENPMU);
+}
+
+int pmu_nmi_interrupt(struct cpu_user_regs *regs, int cpu)
+{
+ return vpmu_do_interrupt(regs);
+}
+
+static int pvpmu_init(struct domain *d, xen_pmu_params_t *params)
+{
+ struct vcpu *v;
+ struct page_info *page;
+ uint64_t gfn = params->d.val;
+ static bool_t __read_mostly pvpmu_initted = 0;
+
+ if ( params->vcpu < 0 || params->vcpu >= d->max_vcpus )
+ return -EINVAL;
+
+ page = get_page_from_gfn(d, gfn, NULL, P2M_ALLOC);
+ if ( !page )
+ return -EINVAL;
+
+ if ( !get_page_type(page, PGT_writable_page) )
+ {
+ put_page(page);
+ return -EINVAL;
+ }
+
+ v = d->vcpu[params->vcpu];
+ v->arch.vpmu.xenpmu_data = __map_domain_page_global(page);
+ if ( !v->arch.vpmu.xenpmu_data )
+ {
+ put_page_and_type(page);
+ return -EINVAL;
+ }
+
+ if ( !pvpmu_initted )
+ {
+ if (reserve_lapic_nmi() == 0)
+ set_nmi_callback(pmu_nmi_interrupt);
+ else
+ {
+ printk("Failed to reserve PMU NMI\n");
+ put_page(page);
+ return -EBUSY;
+ }
+ open_softirq(PMU_SOFTIRQ, pmu_softnmi);
+
+ pvpmu_initted = 1;
+ }
+
+ vpmu_initialise(v);
+
+ return 0;
+}
+
+static void pvpmu_finish(struct domain *d, xen_pmu_params_t *params)
+{
+ struct vcpu *v;
+ uint64_t mfn;
+
+ if ( params->vcpu < 0 || params->vcpu >= d->max_vcpus )
+ return;
+
+ v = d->vcpu[params->vcpu];
+ if (v != current)
+ vcpu_pause(v);
+
+ if ( v->arch.vpmu.xenpmu_data )
+ {
+ mfn = domain_page_map_to_mfn(v->arch.vpmu.xenpmu_data);
+ if ( mfn_valid(mfn) )
+ {
+ unmap_domain_page_global(v->arch.vpmu.xenpmu_data);
+ put_page_and_type(mfn_to_page(mfn));
+ }
+ }
+ vpmu_destroy(v);
+
+ if (v != current)
+ vcpu_unpause(v);
+}
+
+long do_xenpmu_op(int op, XEN_GUEST_HANDLE_PARAM(xen_pmu_params_t) arg)
+{
+ int ret = -EINVAL;
+ xen_pmu_params_t pmu_params;
+
+ switch ( op )
+ {
+ case XENPMU_mode_set:
+ if ( !is_control_domain(current->domain) )
+ return -EPERM;
+
+ if ( copy_from_guest(&pmu_params, arg, 1) )
+ return -EFAULT;
+
+ if ( (pmu_params.d.val & ~(XENPMU_MODE_ON | XENPMU_MODE_PRIV)) ||
+ ((pmu_params.d.val & XENPMU_MODE_ON) &&
+ (pmu_params.d.val & XENPMU_MODE_PRIV)) )
+ return -EINVAL;
+
+ vpmu_mode = pmu_params.d.val;
+
+ if ( (vpmu_mode == XENPMU_MODE_OFF) || (vpmu_mode & XENPMU_MODE_PRIV) )
+ /*
+ * After this VPMU context will never be loaded during context
+ * switch. Because PMU MSR accesses load VPMU context we don't
+ * allow them when VPMU is off and, for non-provileged domains,
+ * when we are in privileged mode. (We do want these accesses to
+ * load VPMU context for control domain in this mode)
+ */
+ vpmu_unload_all();
+
+ ret = 0;
+ break;
+
+ case XENPMU_mode_get:
+ pmu_params.d.val = vpmu_mode;
+ pmu_params.v.version.maj = XENPMU_VER_MAJ;
+ pmu_params.v.version.min = XENPMU_VER_MIN;
+ if ( copy_to_guest(arg, &pmu_params, 1) )
+ return -EFAULT;
+ ret = 0;
+ break;
+
+ case XENPMU_feature_set:
+ if ( !is_control_domain(current->domain) )
+ return -EPERM;
+
+ if ( copy_from_guest(&pmu_params, arg, 1) )
+ return -EFAULT;
+
+ if ( pmu_params.d.val & ~XENPMU_FEATURE_INTEL_BTS )
+ return -EINVAL;
+
+ vpmu_features = pmu_params.d.val;
+
+ ret = 0;
+ break;
+
+ case XENPMU_feature_get:
+ pmu_params.d.val = vpmu_mode;
+ if ( copy_to_guest(arg, &pmu_params, 1) )
+ return -EFAULT;
+ ret = 0;
+ break;
+
+ case XENPMU_init:
+ if ( copy_from_guest(&pmu_params, arg, 1) )
+ return -EFAULT;
+ ret = pvpmu_init(current->domain, &pmu_params);
+ break;
+
+ case XENPMU_finish:
+ if ( copy_from_guest(&pmu_params, arg, 1) )
+ return -EFAULT;
+ pvpmu_finish(current->domain, &pmu_params);
+ break;
+
+ case XENPMU_lvtpc_set:
+ if ( current->arch.vpmu.xenpmu_data == NULL )
+ return -EINVAL;
+ vpmu_lvtpc_update(current->arch.vpmu.xenpmu_data->pmu.l.lapic_lvtpc);
+ ret = 0;
+ break;
+ case XENPMU_flush:
+ current->arch.vpmu.xenpmu_data->pmu_flags &= ~PMU_CACHED;
+ vpmu_lvtpc_update(current->arch.vpmu.xenpmu_data->pmu.l.lapic_lvtpc);
+ vpmu_load(current);
+ ret = 0;
+ break;
+ }
+
+ return ret;
+}
diff --git a/xen/arch/x86/vpmu_amd.c b/xen/arch/x86/vpmu_amd.c
new file mode 100644
index 0000000..32d2882
--- /dev/null
+++ b/xen/arch/x86/vpmu_amd.c
@@ -0,0 +1,509 @@
+/*
+ * vpmu.c: PMU virtualization for HVM domain.
+ *
+ * Copyright (c) 2010, Advanced Micro Devices, Inc.
+ * Parts of this code are Copyright (c) 2007, Intel Corporation
+ *
+ * Author: Wei Wang <wei.wang2@amd.com>
+ * Tested by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ */
+
+#include <xen/config.h>
+#include <xen/xenoprof.h>
+#include <xen/hvm/save.h>
+#include <xen/sched.h>
+#include <xen/irq.h>
+#include <asm/apic.h>
+#include <asm/hvm/vlapic.h>
+#include <asm/vpmu.h>
+#include <public/pmu.h>
+
+#define MSR_F10H_EVNTSEL_GO_SHIFT 40
+#define MSR_F10H_EVNTSEL_EN_SHIFT 22
+#define MSR_F10H_COUNTER_LENGTH 48
+
+#define is_guest_mode(msr) ((msr) & (1ULL << MSR_F10H_EVNTSEL_GO_SHIFT))
+#define is_pmu_enabled(msr) ((msr) & (1ULL << MSR_F10H_EVNTSEL_EN_SHIFT))
+#define set_guest_mode(msr) (msr |= (1ULL << MSR_F10H_EVNTSEL_GO_SHIFT))
+#define is_overflowed(msr) (!((msr) & (1ULL << (MSR_F10H_COUNTER_LENGTH-1))))
+
+static unsigned int __read_mostly num_counters;
+static const u32 __read_mostly *counters;
+static const u32 __read_mostly *ctrls;
+static bool_t __read_mostly k7_counters_mirrored;
+
+#define F10H_NUM_COUNTERS 4
+#define F15H_NUM_COUNTERS 6
+#define AMD_MAX_COUNTERS 6
+
+/* PMU Counter MSRs. */
+static const u32 AMD_F10H_COUNTERS[] = {
+ MSR_K7_PERFCTR0,
+ MSR_K7_PERFCTR1,
+ MSR_K7_PERFCTR2,
+ MSR_K7_PERFCTR3
+};
+
+/* PMU Control MSRs. */
+static const u32 AMD_F10H_CTRLS[] = {
+ MSR_K7_EVNTSEL0,
+ MSR_K7_EVNTSEL1,
+ MSR_K7_EVNTSEL2,
+ MSR_K7_EVNTSEL3
+};
+
+static const u32 AMD_F15H_COUNTERS[] = {
+ MSR_AMD_FAM15H_PERFCTR0,
+ MSR_AMD_FAM15H_PERFCTR1,
+ MSR_AMD_FAM15H_PERFCTR2,
+ MSR_AMD_FAM15H_PERFCTR3,
+ MSR_AMD_FAM15H_PERFCTR4,
+ MSR_AMD_FAM15H_PERFCTR5
+};
+
+static const u32 AMD_F15H_CTRLS[] = {
+ MSR_AMD_FAM15H_EVNTSEL0,
+ MSR_AMD_FAM15H_EVNTSEL1,
+ MSR_AMD_FAM15H_EVNTSEL2,
+ MSR_AMD_FAM15H_EVNTSEL3,
+ MSR_AMD_FAM15H_EVNTSEL4,
+ MSR_AMD_FAM15H_EVNTSEL5
+};
+
+static inline int get_pmu_reg_type(u32 addr)
+{
+ if ( (addr >= MSR_K7_EVNTSEL0) && (addr <= MSR_K7_EVNTSEL3) )
+ return MSR_TYPE_CTRL;
+
+ if ( (addr >= MSR_K7_PERFCTR0) && (addr <= MSR_K7_PERFCTR3) )
+ return MSR_TYPE_COUNTER;
+
+ if ( (addr >= MSR_AMD_FAM15H_EVNTSEL0) &&
+ (addr <= MSR_AMD_FAM15H_PERFCTR5 ) )
+ {
+ if (addr & 1)
+ return MSR_TYPE_COUNTER;
+ else
+ return MSR_TYPE_CTRL;
+ }
+
+ /* unsupported registers */
+ return -1;
+}
+
+static inline u32 get_fam15h_addr(u32 addr)
+{
+ switch ( addr )
+ {
+ case MSR_K7_PERFCTR0:
+ return MSR_AMD_FAM15H_PERFCTR0;
+ case MSR_K7_PERFCTR1:
+ return MSR_AMD_FAM15H_PERFCTR1;
+ case MSR_K7_PERFCTR2:
+ return MSR_AMD_FAM15H_PERFCTR2;
+ case MSR_K7_PERFCTR3:
+ return MSR_AMD_FAM15H_PERFCTR3;
+ case MSR_K7_EVNTSEL0:
+ return MSR_AMD_FAM15H_EVNTSEL0;
+ case MSR_K7_EVNTSEL1:
+ return MSR_AMD_FAM15H_EVNTSEL1;
+ case MSR_K7_EVNTSEL2:
+ return MSR_AMD_FAM15H_EVNTSEL2;
+ case MSR_K7_EVNTSEL3:
+ return MSR_AMD_FAM15H_EVNTSEL3;
+ default:
+ break;
+ }
+
+ return addr;
+}
+
+static void amd_vpmu_set_msr_bitmap(struct vcpu *v)
+{
+ unsigned int i;
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ struct xen_pmu_amd_ctxt *ctxt = vpmu->context;
+
+ for ( i = 0; i < num_counters; i++ )
+ {
+ svm_intercept_msr(v, counters[i], MSR_INTERCEPT_NONE);
+ svm_intercept_msr(v, ctrls[i], MSR_INTERCEPT_WRITE);
+ }
+
+ ctxt->msr_bitmap_set = 1;
+}
+
+static void amd_vpmu_unset_msr_bitmap(struct vcpu *v)
+{
+ unsigned int i;
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ struct xen_pmu_amd_ctxt *ctxt = vpmu->context;
+
+ for ( i = 0; i < num_counters; i++ )
+ {
+ svm_intercept_msr(v, counters[i], MSR_INTERCEPT_RW);
+ svm_intercept_msr(v, ctrls[i], MSR_INTERCEPT_RW);
+ }
+
+ ctxt->msr_bitmap_set = 0;
+}
+
+/* Must be NMI-safe */
+static int amd_vpmu_do_interrupt(struct cpu_user_regs *regs)
+{
+ return 1;
+}
+
+static inline void context_load(struct vcpu *v)
+{
+ unsigned int i;
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ struct xen_pmu_amd_ctxt *ctxt = vpmu->context;
+ uint64_t *counter_regs = vpmu_reg_pointer(ctxt, counters);
+ uint64_t *ctrl_regs = vpmu_reg_pointer(ctxt, ctrls);
+
+ for ( i = 0; i < num_counters; i++ )
+ {
+ wrmsrl(counters[i], counter_regs[i]);
+ wrmsrl(ctrls[i], ctrl_regs[i]);
+ }
+}
+
+/* Must be NMI-safe */
+static void amd_vpmu_load(struct vcpu *v)
+{
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ struct xen_pmu_amd_ctxt *ctxt = vpmu->context;
+ uint64_t *ctrl_regs = vpmu_reg_pointer(ctxt, ctrls);
+
+ vpmu_reset(vpmu, VPMU_FROZEN);
+
+ if ( vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
+ {
+ unsigned int i;
+
+ for ( i = 0; i < num_counters; i++ )
+ wrmsrl(ctrls[i], ctrl_regs[i]);
+
+ return;
+ }
+
+ vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
+
+ context_load(v);
+}
+
+static inline void context_save(struct vcpu *v)
+{
+ unsigned int i;
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ struct xen_pmu_amd_ctxt *ctxt = vpmu->context;
+ uint64_t *counter_regs = vpmu_reg_pointer(ctxt, counters);
+
+ /* No need to save controls -- they are saved in amd_vpmu_do_wrmsr */
+ for ( i = 0; i < num_counters; i++ )
+ rdmsrl(counters[i], counter_regs[i]);
+}
+
+static int amd_vpmu_save(struct vcpu *v)
+{
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ struct xen_pmu_amd_ctxt *ctx = vpmu->context;
+ unsigned int i;
+
+ /*
+ * Stop the counters. If we came here via vpmu_save_force (i.e.
+ * when VPMU_CONTEXT_SAVE is set) counters are already stopped.
+ */
+ if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_SAVE) )
+ {
+ vpmu_set(vpmu, VPMU_FROZEN);
+
+ for ( i = 0; i < num_counters; i++ )
+ wrmsrl(ctrls[i], 0);
+
+ return 0;
+ }
+
+ if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
+ return 0;
+
+ context_save(v);
+
+ if ( has_hvm_container_domain(v->domain) &&
+ !vpmu_is_set(vpmu, VPMU_RUNNING) && ctx->msr_bitmap_set )
+ amd_vpmu_unset_msr_bitmap(v);
+
+ return 1;
+}
+
+static void context_update(unsigned int msr, u64 msr_content)
+{
+ unsigned int i;
+ struct vcpu *v = current;
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ struct xen_pmu_amd_ctxt *ctxt = vpmu->context;
+ uint64_t *counter_regs = vpmu_reg_pointer(ctxt, counters);
+ uint64_t *ctrl_regs = vpmu_reg_pointer(ctxt, ctrls);
+
+ if ( k7_counters_mirrored &&
+ ((msr >= MSR_K7_EVNTSEL0) && (msr <= MSR_K7_PERFCTR3)) )
+ {
+ msr = get_fam15h_addr(msr);
+ }
+
+ for ( i = 0; i < num_counters; i++ )
+ {
+ if ( msr == ctrls[i] )
+ {
+ ctrl_regs[i] = msr_content;
+ return;
+ }
+ else if (msr == counters[i] )
+ {
+ counter_regs[i] = msr_content;
+ return;
+ }
+ }
+}
+
+static int amd_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
+{
+ struct vcpu *v = current;
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+
+ /* For all counters, enable guest only mode for HVM guest */
+ if ( has_hvm_container_domain(v->domain) && (get_pmu_reg_type(msr) == MSR_TYPE_CTRL) &&
+ !(is_guest_mode(msr_content)) )
+ {
+ set_guest_mode(msr_content);
+ }
+
+ /* check if the first counter is enabled */
+ if ( (get_pmu_reg_type(msr) == MSR_TYPE_CTRL) &&
+ is_pmu_enabled(msr_content) && !vpmu_is_set(vpmu, VPMU_RUNNING) )
+ {
+ if ( !acquire_pmu_ownership(PMU_OWNER_HVM) )
+ return 1;
+ vpmu_set(vpmu, VPMU_RUNNING);
+
+ if ( has_hvm_container_domain(v->domain) &&
+ !((struct xen_pmu_amd_ctxt *)vpmu->context)->msr_bitmap_set )
+ amd_vpmu_set_msr_bitmap(v);
+ }
+
+ /* stop saving & restore if guest stops first counter */
+ if ( (get_pmu_reg_type(msr) == MSR_TYPE_CTRL) &&
+ (is_pmu_enabled(msr_content) == 0) && vpmu_is_set(vpmu, VPMU_RUNNING) )
+ {
+ vpmu_reset(vpmu, VPMU_RUNNING);
+ if ( has_hvm_container_domain(v->domain) &&
+ ((struct xen_pmu_amd_ctxt *)vpmu->context)->msr_bitmap_set )
+ amd_vpmu_unset_msr_bitmap(v);
+ release_pmu_ownship(PMU_OWNER_HVM);
+ }
+
+ if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED)
+ || vpmu_is_set(vpmu, VPMU_FROZEN) )
+ {
+ context_load(v);
+ vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
+ vpmu_reset(vpmu, VPMU_FROZEN);
+ }
+
+ /* Update vpmu context immediately */
+ context_update(msr, msr_content);
+
+ /* Write to hw counters */
+ wrmsrl(msr, msr_content);
+ return 1;
+}
+
+static int amd_vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content)
+{
+ struct vcpu *v = current;
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+
+ if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED)
+ || vpmu_is_set(vpmu, VPMU_FROZEN) )
+ {
+ context_load(v);
+ vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
+ vpmu_reset(vpmu, VPMU_FROZEN);
+ }
+
+ rdmsrl(msr, *msr_content);
+
+ return 1;
+}
+
+static int amd_vpmu_initialise(struct vcpu *v)
+{
+ struct xen_pmu_amd_ctxt *ctxt;
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ uint8_t family = current_cpu_data.x86;
+
+ if ( vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
+ return 0;
+
+ if ( counters == NULL )
+ {
+ switch ( family )
+ {
+ case 0x15:
+ num_counters = F15H_NUM_COUNTERS;
+ counters = AMD_F15H_COUNTERS;
+ ctrls = AMD_F15H_CTRLS;
+ k7_counters_mirrored = 1;
+ break;
+ case 0x10:
+ case 0x12:
+ case 0x14:
+ case 0x16:
+ default:
+ num_counters = F10H_NUM_COUNTERS;
+ counters = AMD_F10H_COUNTERS;
+ ctrls = AMD_F10H_CTRLS;
+ k7_counters_mirrored = 0;
+ break;
+ }
+ }
+
+ if ( has_hvm_container_domain(v->domain) )
+ {
+ ctxt = xzalloc_bytes(sizeof(struct xen_pmu_amd_ctxt) +
+ sizeof(uint64_t) * AMD_MAX_COUNTERS +
+ sizeof(uint64_t) * AMD_MAX_COUNTERS);
+ if ( !ctxt )
+ {
+ gdprintk(XENLOG_WARNING, "Insufficient memory for PMU, "
+ " PMU feature is unavailable on domain %d vcpu %d.\n",
+ v->vcpu_id, v->domain->domain_id);
+ return -ENOMEM;
+ }
+ }
+ else
+ ctxt = &v->arch.vpmu.xenpmu_data->pmu.c.amd;
+
+ ctxt->counters = sizeof(struct xen_pmu_amd_ctxt);
+ ctxt->ctrls = ctxt->counters + sizeof(uint64_t) * AMD_MAX_COUNTERS;
+
+ vpmu->context = ctxt;
+ vpmu_set(vpmu, VPMU_CONTEXT_ALLOCATED);
+ return 0;
+}
+
+static void amd_vpmu_destroy(struct vcpu *v)
+{
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+
+ if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
+ return;
+
+ if ( has_hvm_container_domain(v->domain) )
+ {
+ if ( ((struct xen_pmu_amd_ctxt *)vpmu->context)->msr_bitmap_set )
+ amd_vpmu_unset_msr_bitmap(v);
+
+ xfree(vpmu->context);
+ }
+
+ vpmu->context = NULL;
+ vpmu_clear(vpmu);
+ release_pmu_ownship(PMU_OWNER_HVM);
+}
+
+/* VPMU part of the 'q' keyhandler */
+static void amd_vpmu_dump(const struct vcpu *v)
+{
+ const struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ const struct xen_pmu_amd_ctxt *ctxt = vpmu->context;
+ uint64_t *counter_regs = vpmu_reg_pointer(ctxt, counters);
+ uint64_t *ctrl_regs = vpmu_reg_pointer(ctxt, ctrls);
+ unsigned int i;
+
+ printk(" VPMU state: 0x%x ", vpmu->flags);
+ if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
+ {
+ printk("\n");
+ return;
+ }
+
+ printk("(");
+ if ( vpmu_is_set(vpmu, VPMU_PASSIVE_DOMAIN_ALLOCATED) )
+ printk("PASSIVE_DOMAIN_ALLOCATED, ");
+ if ( vpmu_is_set(vpmu, VPMU_FROZEN) )
+ printk("FROZEN, ");
+ if ( vpmu_is_set(vpmu, VPMU_CONTEXT_SAVE) )
+ printk("SAVE, ");
+ if ( vpmu_is_set(vpmu, VPMU_RUNNING) )
+ printk("RUNNING, ");
+ if ( vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
+ printk("LOADED, ");
+ printk("ALLOCATED)\n");
+
+ for ( i = 0; i < num_counters; i++ )
+ {
+ uint64_t ctrl, cntr;
+
+ rdmsrl(ctrls[i], ctrl);
+ rdmsrl(counters[i], cntr);
+ printk(" %#x: %#lx (%#lx in HW) %#x: %#lx (%#lx in HW)\n",
+ ctrls[i], ctrl_regs[i], ctrl,
+ counters[i], counter_regs[i], cntr);
+ }
+}
+
+struct arch_vpmu_ops amd_vpmu_ops = {
+ .do_wrmsr = amd_vpmu_do_wrmsr,
+ .do_rdmsr = amd_vpmu_do_rdmsr,
+ .do_interrupt = amd_vpmu_do_interrupt,
+ .arch_vpmu_destroy = amd_vpmu_destroy,
+ .arch_vpmu_save = amd_vpmu_save,
+ .arch_vpmu_load = amd_vpmu_load,
+ .arch_vpmu_dump = amd_vpmu_dump
+};
+
+int svm_vpmu_initialise(struct vcpu *v)
+{
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ uint8_t family = current_cpu_data.x86;
+ int ret = 0;
+
+ /* vpmu enabled? */
+ if ( vpmu_mode == XENPMU_MODE_OFF )
+ return 0;
+
+ switch ( family )
+ {
+ case 0x10:
+ case 0x12:
+ case 0x14:
+ case 0x15:
+ case 0x16:
+ ret = amd_vpmu_initialise(v);
+ if ( !ret )
+ vpmu->arch_vpmu_ops = &amd_vpmu_ops;
+ return ret;
+ }
+
+ printk("VPMU: Initialization failed. "
+ "AMD processor family %d has not "
+ "been supported\n", family);
+ return -EINVAL;
+}
+
diff --git a/xen/arch/x86/vpmu_intel.c b/xen/arch/x86/vpmu_intel.c
new file mode 100644
index 0000000..195511e
--- /dev/null
+++ b/xen/arch/x86/vpmu_intel.c
@@ -0,0 +1,940 @@
+/*
+ * vpmu_core2.c: CORE 2 specific PMU virtualization for HVM domain.
+ *
+ * Copyright (c) 2007, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Author: Haitao Shan <haitao.shan@intel.com>
+ */
+
+#include <xen/config.h>
+#include <xen/sched.h>
+#include <xen/xenoprof.h>
+#include <xen/irq.h>
+#include <asm/system.h>
+#include <asm/regs.h>
+#include <asm/types.h>
+#include <asm/apic.h>
+#include <asm/traps.h>
+#include <asm/msr.h>
+#include <asm/msr-index.h>
+#include <asm/hvm/support.h>
+#include <asm/hvm/vlapic.h>
+#include <asm/hvm/vmx/vmx.h>
+#include <asm/hvm/vmx/vmcs.h>
+#include <public/sched.h>
+#include <public/hvm/save.h>
+#include <public/pmu.h>
+#include <asm/vpmu.h>
+
+/*
+ * See Intel SDM Vol 2a Instruction Set Reference chapter 3 for CPUID
+ * instruction.
+ * cpuid 0xa - Architectural Performance Monitoring Leaf
+ * Register eax
+ */
+#define PMU_VERSION_SHIFT 0 /* Version ID */
+#define PMU_VERSION_BITS 8 /* 8 bits 0..7 */
+#define PMU_VERSION_MASK (((1 << PMU_VERSION_BITS) - 1) << PMU_VERSION_SHIFT)
+
+#define PMU_GENERAL_NR_SHIFT 8 /* Number of general pmu registers */
+#define PMU_GENERAL_NR_BITS 8 /* 8 bits 8..15 */
+#define PMU_GENERAL_NR_MASK (((1 << PMU_GENERAL_NR_BITS) - 1) << PMU_GENERAL_NR_SHIFT)
+
+#define PMU_GENERAL_WIDTH_SHIFT 16 /* Width of general pmu registers */
+#define PMU_GENERAL_WIDTH_BITS 8 /* 8 bits 16..23 */
+#define PMU_GENERAL_WIDTH_MASK (((1 << PMU_GENERAL_WIDTH_BITS) - 1) << PMU_GENERAL_WIDTH_SHIFT)
+/* Register edx */
+#define PMU_FIXED_NR_SHIFT 0 /* Number of fixed pmu registers */
+#define PMU_FIXED_NR_BITS 5 /* 5 bits 0..4 */
+#define PMU_FIXED_NR_MASK (((1 << PMU_FIXED_NR_BITS) -1) << PMU_FIXED_NR_SHIFT)
+
+#define PMU_FIXED_WIDTH_SHIFT 5 /* Width of fixed pmu registers */
+#define PMU_FIXED_WIDTH_BITS 8 /* 8 bits 5..12 */
+#define PMU_FIXED_WIDTH_MASK (((1 << PMU_FIXED_WIDTH_BITS) -1) << PMU_FIXED_WIDTH_SHIFT)
+
+/* Alias registers (0x4c1) for full-width writes to PMCs */
+#define MSR_PMC_ALIAS_MASK (~(MSR_IA32_PERFCTR0 ^ MSR_IA32_A_PERFCTR0))
+static bool_t __read_mostly full_width_write;
+
+/* Intel-specific VPMU features */
+#define VPMU_CPU_HAS_DS 0x100 /* Has Debug Store */
+#define VPMU_CPU_HAS_BTS 0x200 /* Has Branch Trace Store */
+
+/*
+ * MSR_CORE_PERF_FIXED_CTR_CTRL contains the configuration of all fixed
+ * counters. 4 bits for every counter.
+ */
+#define FIXED_CTR_CTRL_BITS 4
+#define FIXED_CTR_CTRL_MASK ((1 << FIXED_CTR_CTRL_BITS) - 1)
+
+/* Number of general-purpose and fixed performance counters */
+static unsigned int __read_mostly arch_pmc_cnt, fixed_pmc_cnt;
+
+/*
+ * QUIRK to workaround an issue on various family 6 cpus.
+ * The issue leads to endless PMC interrupt loops on the processor.
+ * If the interrupt handler is running and a pmc reaches the value 0, this
+ * value remains forever and it triggers immediately a new interrupt after
+ * finishing the handler.
+ * A workaround is to read all flagged counters and if the value is 0 write
+ * 1 (or another value != 0) into it.
+ * There exist no errata and the real cause of this behaviour is unknown.
+ */
+bool_t __read_mostly is_pmc_quirk;
+
+static void check_pmc_quirk(void)
+{
+ if ( current_cpu_data.x86 == 6 )
+ is_pmc_quirk = 1;
+ else
+ is_pmc_quirk = 0;
+}
+
+static void handle_pmc_quirk(u64 msr_content)
+{
+ int i;
+ u64 val;
+
+ if ( !is_pmc_quirk )
+ return;
+
+ val = msr_content;
+ for ( i = 0; i < arch_pmc_cnt; i++ )
+ {
+ if ( val & 0x1 )
+ {
+ u64 cnt;
+ rdmsrl(MSR_P6_PERFCTR0 + i, cnt);
+ if ( cnt == 0 )
+ wrmsrl(MSR_P6_PERFCTR0 + i, 1);
+ }
+ val >>= 1;
+ }
+ val = msr_content >> 32;
+ for ( i = 0; i < fixed_pmc_cnt; i++ )
+ {
+ if ( val & 0x1 )
+ {
+ u64 cnt;
+ rdmsrl(MSR_CORE_PERF_FIXED_CTR0 + i, cnt);
+ if ( cnt == 0 )
+ wrmsrl(MSR_CORE_PERF_FIXED_CTR0 + i, 1);
+ }
+ val >>= 1;
+ }
+}
+
+/*
+ * Read the number of general counters via CPUID.EAX[0xa].EAX[8..15]
+ */
+static int core2_get_arch_pmc_count(void)
+{
+ u32 eax;
+
+ eax = cpuid_eax(0xa);
+ return ( (eax & PMU_GENERAL_NR_MASK) >> PMU_GENERAL_NR_SHIFT );
+}
+
+/*
+ * Read the number of fixed counters via CPUID.EDX[0xa].EDX[0..4]
+ */
+static int core2_get_fixed_pmc_count(void)
+{
+ u32 eax;
+
+ eax = cpuid_eax(0xa);
+ return ( (eax & PMU_FIXED_NR_MASK) >> PMU_FIXED_NR_SHIFT );
+}
+
+/* edx bits 5-12: Bit width of fixed-function performance counters */
+static int core2_get_bitwidth_fix_count(void)
+{
+ u32 edx;
+
+ edx = cpuid_edx(0xa);
+ return ( (edx & PMU_FIXED_WIDTH_MASK) >> PMU_FIXED_WIDTH_SHIFT );
+}
+
+static int is_core2_vpmu_msr(u32 msr_index, int *type, int *index)
+{
+ int i;
+ u32 msr_index_pmc;
+
+ for ( i = 0; i < fixed_pmc_cnt; i++ )
+ {
+ if ( msr_index == MSR_CORE_PERF_FIXED_CTR0 + i )
+ {
+ *type = MSR_TYPE_COUNTER;
+ *index = i;
+ return 1;
+ }
+ }
+
+ if ( (msr_index == MSR_CORE_PERF_FIXED_CTR_CTRL ) ||
+ (msr_index == MSR_IA32_DS_AREA) ||
+ (msr_index == MSR_IA32_PEBS_ENABLE) )
+ {
+ *type = MSR_TYPE_CTRL;
+ return 1;
+ }
+
+ if ( (msr_index == MSR_CORE_PERF_GLOBAL_CTRL) ||
+ (msr_index == MSR_CORE_PERF_GLOBAL_STATUS) ||
+ (msr_index == MSR_CORE_PERF_GLOBAL_OVF_CTRL) )
+ {
+ *type = MSR_TYPE_GLOBAL;
+ return 1;
+ }
+
+ msr_index_pmc = msr_index & MSR_PMC_ALIAS_MASK;
+ if ( (msr_index_pmc >= MSR_IA32_PERFCTR0) &&
+ (msr_index_pmc < (MSR_IA32_PERFCTR0 + arch_pmc_cnt)) )
+ {
+ *type = MSR_TYPE_ARCH_COUNTER;
+ *index = msr_index_pmc - MSR_IA32_PERFCTR0;
+ return 1;
+ }
+
+ if ( (msr_index >= MSR_P6_EVNTSEL0) &&
+ (msr_index < (MSR_P6_EVNTSEL0 + arch_pmc_cnt)) )
+ {
+ *type = MSR_TYPE_ARCH_CTRL;
+ *index = msr_index - MSR_P6_EVNTSEL0;
+ return 1;
+ }
+
+ return 0;
+}
+
+#define msraddr_to_bitpos(x) (((x)&0xffff) + ((x)>>31)*0x2000)
+static void core2_vpmu_set_msr_bitmap(unsigned long *msr_bitmap)
+{
+ int i;
+
+ /* Allow Read/Write PMU Counters MSR Directly. */
+ for ( i = 0; i < fixed_pmc_cnt; i++ )
+ {
+ clear_bit(msraddr_to_bitpos(MSR_CORE_PERF_FIXED_CTR0 + i), msr_bitmap);
+ clear_bit(msraddr_to_bitpos(MSR_CORE_PERF_FIXED_CTR0 + i),
+ msr_bitmap + 0x800/BYTES_PER_LONG);
+ }
+ for ( i = 0; i < arch_pmc_cnt; i++ )
+ {
+ clear_bit(msraddr_to_bitpos(MSR_IA32_PERFCTR0+i), msr_bitmap);
+ clear_bit(msraddr_to_bitpos(MSR_IA32_PERFCTR0+i),
+ msr_bitmap + 0x800/BYTES_PER_LONG);
+
+ if ( full_width_write )
+ {
+ clear_bit(msraddr_to_bitpos(MSR_IA32_A_PERFCTR0 + i), msr_bitmap);
+ clear_bit(msraddr_to_bitpos(MSR_IA32_A_PERFCTR0 + i),
+ msr_bitmap + 0x800/BYTES_PER_LONG);
+ }
+ }
+
+ /* Allow Read PMU Non-global Controls Directly. */
+ for ( i = 0; i < arch_pmc_cnt; i++ )
+ clear_bit(msraddr_to_bitpos(MSR_P6_EVNTSEL0 + i), msr_bitmap);
+
+ clear_bit(msraddr_to_bitpos(MSR_CORE_PERF_FIXED_CTR_CTRL), msr_bitmap);
+ clear_bit(msraddr_to_bitpos(MSR_IA32_PEBS_ENABLE), msr_bitmap);
+ clear_bit(msraddr_to_bitpos(MSR_IA32_DS_AREA), msr_bitmap);
+}
+
+static void core2_vpmu_unset_msr_bitmap(unsigned long *msr_bitmap)
+{
+ int i;
+
+ for ( i = 0; i < fixed_pmc_cnt; i++ )
+ {
+ set_bit(msraddr_to_bitpos(MSR_CORE_PERF_FIXED_CTR0 + i), msr_bitmap);
+ set_bit(msraddr_to_bitpos(MSR_CORE_PERF_FIXED_CTR0 + i),
+ msr_bitmap + 0x800/BYTES_PER_LONG);
+ }
+ for ( i = 0; i < arch_pmc_cnt; i++ )
+ {
+ set_bit(msraddr_to_bitpos(MSR_IA32_PERFCTR0 + i), msr_bitmap);
+ set_bit(msraddr_to_bitpos(MSR_IA32_PERFCTR0 + i),
+ msr_bitmap + 0x800/BYTES_PER_LONG);
+
+ if ( full_width_write )
+ {
+ set_bit(msraddr_to_bitpos(MSR_IA32_A_PERFCTR0 + i), msr_bitmap);
+ set_bit(msraddr_to_bitpos(MSR_IA32_A_PERFCTR0 + i),
+ msr_bitmap + 0x800/BYTES_PER_LONG);
+ }
+ }
+
+ for ( i = 0; i < arch_pmc_cnt; i++ )
+ set_bit(msraddr_to_bitpos(MSR_P6_EVNTSEL0 + i), msr_bitmap);
+
+ set_bit(msraddr_to_bitpos(MSR_CORE_PERF_FIXED_CTR_CTRL), msr_bitmap);
+ set_bit(msraddr_to_bitpos(MSR_IA32_PEBS_ENABLE), msr_bitmap);
+ set_bit(msraddr_to_bitpos(MSR_IA32_DS_AREA), msr_bitmap);
+}
+
+static inline void __core2_vpmu_save(struct vcpu *v)
+{
+ int i;
+ struct xen_pmu_intel_ctxt *core2_vpmu_cxt = vcpu_vpmu(v)->context;
+ uint64_t *fixed_counters = vpmu_reg_pointer(core2_vpmu_cxt, fixed_counters);
+ struct xen_pmu_cntr_pair *xen_pmu_cntr_pair =
+ vpmu_reg_pointer(core2_vpmu_cxt, arch_counters);
+
+ for ( i = 0; i < fixed_pmc_cnt; i++ )
+ rdmsrl(MSR_CORE_PERF_FIXED_CTR0 + i, fixed_counters[i]);
+ for ( i = 0; i < arch_pmc_cnt; i++ )
+ rdmsrl(MSR_IA32_PERFCTR0 + i, xen_pmu_cntr_pair[i].counter);
+
+ if ( !has_hvm_container_domain(v->domain) )
+ rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS, core2_vpmu_cxt->global_status);
+}
+
+/* Must be NMI-safe */
+static int core2_vpmu_save(struct vcpu *v)
+{
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+
+ if ( !has_hvm_container_domain(v->domain) )
+ wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0);
+
+ if ( !vpmu_is_set_all(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED) )
+ return 0;
+
+ __core2_vpmu_save(v);
+
+ /* Unset PMU MSR bitmap to trap lazy load. */
+ if ( !vpmu_is_set(vpmu, VPMU_RUNNING) && cpu_has_vmx_msr_bitmap
+ && has_hvm_container_domain(v->domain) )
+ core2_vpmu_unset_msr_bitmap(v->arch.hvm_vmx.msr_bitmap);
+
+ return 1;
+}
+
+static inline void __core2_vpmu_load(struct vcpu *v)
+{
+ unsigned int i, pmc_start;
+ struct xen_pmu_intel_ctxt *core2_vpmu_cxt = vcpu_vpmu(v)->context;
+ uint64_t *fixed_counters = vpmu_reg_pointer(core2_vpmu_cxt, fixed_counters);
+ struct xen_pmu_cntr_pair *xen_pmu_cntr_pair =
+ vpmu_reg_pointer(core2_vpmu_cxt, arch_counters);
+
+ for ( i = 0; i < fixed_pmc_cnt; i++ )
+ wrmsrl(MSR_CORE_PERF_FIXED_CTR0 + i, fixed_counters[i]);
+
+ if ( full_width_write )
+ pmc_start = MSR_IA32_A_PERFCTR0;
+ else
+ pmc_start = MSR_IA32_PERFCTR0;
+ for ( i = 0; i < arch_pmc_cnt; i++ )
+ {
+ wrmsrl(pmc_start + i, xen_pmu_cntr_pair[i].counter);
+ wrmsrl(MSR_P6_EVNTSEL0 + i, xen_pmu_cntr_pair[i].control);
+ }
+
+ wrmsrl(MSR_CORE_PERF_FIXED_CTR_CTRL, core2_vpmu_cxt->fixed_ctrl);
+ wrmsrl(MSR_IA32_DS_AREA, core2_vpmu_cxt->ds_area);
+ wrmsrl(MSR_IA32_PEBS_ENABLE, core2_vpmu_cxt->pebs_enable);
+
+ if ( !has_hvm_container_domain(v->domain) )
+ {
+ wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, core2_vpmu_cxt->global_ovf_ctrl);
+ core2_vpmu_cxt->global_ovf_ctrl = 0;
+ wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, core2_vpmu_cxt->global_ctrl);
+ }
+}
+
+static void core2_vpmu_load(struct vcpu *v)
+{
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+
+ if ( vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
+ return;
+
+ vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
+
+ __core2_vpmu_load(v);
+}
+
+static int core2_vpmu_alloc_resource(struct vcpu *v)
+{
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ struct xen_pmu_intel_ctxt *core2_vpmu_cxt;
+
+ if ( !is_pv_domain(v->domain) )
+ {
+ if ( !acquire_pmu_ownership(PMU_OWNER_HVM) )
+ return 0;
+
+ wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0);
+ if ( vmx_add_host_load_msr(MSR_CORE_PERF_GLOBAL_CTRL) )
+ goto out_err;
+
+ if ( vmx_add_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL) )
+ goto out_err;
+ vmx_write_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, 0);
+
+ core2_vpmu_cxt = xzalloc_bytes(sizeof(struct xen_pmu_intel_ctxt) +
+ sizeof(uint64_t) * fixed_pmc_cnt +
+ sizeof(struct xen_pmu_cntr_pair) * arch_pmc_cnt);
+ if ( !core2_vpmu_cxt )
+ goto out_err;
+ }
+ else
+ {
+ core2_vpmu_cxt = &v->arch.vpmu.xenpmu_data->pmu.c.intel;
+ vpmu_set(vpmu, VPMU_CONTEXT_ALLOCATED);
+ }
+
+ core2_vpmu_cxt->fixed_counters = sizeof(struct xen_pmu_intel_ctxt);
+ core2_vpmu_cxt->arch_counters = core2_vpmu_cxt->fixed_counters +
+ sizeof(uint64_t) * fixed_pmc_cnt;
+
+ vpmu->context = (void *)core2_vpmu_cxt;
+
+ vpmu_set(vpmu, VPMU_CONTEXT_ALLOCATED);
+
+ return 1;
+
+out_err:
+ vmx_rm_host_load_msr(MSR_CORE_PERF_GLOBAL_CTRL);
+ vmx_rm_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL);
+ release_pmu_ownship(PMU_OWNER_HVM);
+
+ printk("Failed to allocate VPMU resources for domain %u vcpu %u\n",
+ v->vcpu_id, v->domain->domain_id);
+
+ return 0;
+}
+
+static int core2_vpmu_msr_common_check(u32 msr_index, int *type, int *index)
+{
+ struct vpmu_struct *vpmu = vcpu_vpmu(current);
+
+ if ( !is_core2_vpmu_msr(msr_index, type, index) )
+ return 0;
+
+ if ( unlikely(!vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED)) &&
+ !core2_vpmu_alloc_resource(current) )
+ return 0;
+
+ /* Do the lazy load staff. */
+ if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
+ {
+ __core2_vpmu_load(current);
+ vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
+ if ( cpu_has_vmx_msr_bitmap && has_hvm_container_domain(current->domain) )
+ core2_vpmu_set_msr_bitmap(current->arch.hvm_vmx.msr_bitmap);
+ }
+ return 1;
+}
+
+static void inject_trap(struct vcpu *v, unsigned int trapno)
+{
+ if ( has_hvm_container_domain(v->domain) )
+ hvm_inject_hw_exception(trapno, 0);
+ else
+ send_guest_trap(v->domain, v->vcpu_id, trapno);
+}
+
+static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
+{
+ u64 global_ctrl, non_global_ctrl;
+ unsigned pmu_enable = 0;
+ int i, tmp;
+ int type = -1, index = -1;
+ struct vcpu *v = current;
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ struct xen_pmu_intel_ctxt *core2_vpmu_cxt = NULL;
+
+ if ( !core2_vpmu_msr_common_check(msr, &type, &index) )
+ {
+ /* Special handling for BTS */
+ if ( msr == MSR_IA32_DEBUGCTLMSR )
+ {
+ uint64_t supported = IA32_DEBUGCTLMSR_TR | IA32_DEBUGCTLMSR_BTS |
+ IA32_DEBUGCTLMSR_BTINT;
+
+ if ( cpu_has(¤t_cpu_data, X86_FEATURE_DSCPL) )
+ supported |= IA32_DEBUGCTLMSR_BTS_OFF_OS |
+ IA32_DEBUGCTLMSR_BTS_OFF_USR;
+ if ( msr_content & supported )
+ {
+ if ( vpmu_is_set(vpmu, VPMU_CPU_HAS_BTS) )
+ return 1;
+ gdprintk(XENLOG_WARNING, "Debug Store is not supported on this cpu\n");
+ inject_trap(v, TRAP_gp_fault);
+ return 0;
+ }
+ }
+ return 0;
+ }
+
+ core2_vpmu_cxt = vpmu->context;
+ switch ( msr )
+ {
+ case MSR_CORE_PERF_GLOBAL_OVF_CTRL:
+ core2_vpmu_cxt->global_status &= ~msr_content;
+ wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, msr_content);
+ return 1;
+ case MSR_CORE_PERF_GLOBAL_STATUS:
+ gdprintk(XENLOG_INFO, "Can not write readonly MSR: "
+ "MSR_PERF_GLOBAL_STATUS(0x38E)!\n");
+ inject_trap(v, TRAP_gp_fault);
+ return 1;
+ case MSR_IA32_PEBS_ENABLE:
+ if ( msr_content & 1 )
+ gdprintk(XENLOG_WARNING, "Guest is trying to enable PEBS, "
+ "which is not supported.\n");
+ core2_vpmu_cxt->pebs_enable = msr_content;
+ return 1;
+ case MSR_IA32_DS_AREA:
+ if ( vpmu_is_set(vpmu, VPMU_CPU_HAS_DS) )
+ {
+ if ( !is_canonical_address(msr_content) )
+ {
+ gdprintk(XENLOG_WARNING,
+ "Illegal address for IA32_DS_AREA: %#" PRIx64 "x\n",
+ msr_content);
+ inject_trap(v, TRAP_gp_fault);
+ return 1;
+ }
+ core2_vpmu_cxt->ds_area = msr_content;
+ break;
+ }
+ gdprintk(XENLOG_WARNING, "Guest setting of DTS is ignored.\n");
+ return 1;
+ case MSR_CORE_PERF_GLOBAL_CTRL:
+ global_ctrl = msr_content;
+ for ( i = 0; i < arch_pmc_cnt; i++ )
+ {
+ rdmsrl(MSR_P6_EVNTSEL0+i, non_global_ctrl);
+ pmu_enable += global_ctrl & (non_global_ctrl >> 22) & 1;
+ global_ctrl >>= 1;
+ }
+
+ rdmsrl(MSR_CORE_PERF_FIXED_CTR_CTRL, non_global_ctrl);
+ global_ctrl = msr_content >> 32;
+ for ( i = 0; i < fixed_pmc_cnt; i++ )
+ {
+ pmu_enable += (global_ctrl & 1) & ((non_global_ctrl & 0x3)? 1 : 0);
+ non_global_ctrl >>= FIXED_CTR_CTRL_BITS;
+ global_ctrl >>= 1;
+ }
+ core2_vpmu_cxt->global_ctrl = msr_content;
+ break;
+ case MSR_CORE_PERF_FIXED_CTR_CTRL:
+ non_global_ctrl = msr_content;
+ if ( has_hvm_container_domain(v->domain) )
+ vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, &global_ctrl);
+ else
+ rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, global_ctrl);
+ global_ctrl >>= 32;
+ for ( i = 0; i < fixed_pmc_cnt; i++ )
+ {
+ pmu_enable += (global_ctrl & 1) & ((non_global_ctrl & 0x3)? 1 : 0);
+ non_global_ctrl >>= 4;
+ global_ctrl >>= 1;
+ }
+ core2_vpmu_cxt->fixed_ctrl = msr_content;
+ break;
+ default:
+ tmp = msr - MSR_P6_EVNTSEL0;
+ if ( tmp >= 0 && tmp < arch_pmc_cnt )
+ {
+ struct xen_pmu_cntr_pair *xen_pmu_cntr_pair =
+ vpmu_reg_pointer(core2_vpmu_cxt, arch_counters);
+
+ if ( has_hvm_container_domain(v->domain) )
+ vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, &global_ctrl);
+ else
+ rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, global_ctrl);
+ xen_pmu_cntr_pair[tmp].control = msr_content;
+ for ( i = 0; i < arch_pmc_cnt && !pmu_enable; i++ )
+ pmu_enable += (global_ctrl >> i) &
+ (xen_pmu_cntr_pair[i].control >> 22) & 1;
+ }
+ }
+
+ pmu_enable += (core2_vpmu_cxt->ds_area != 0);
+ if ( pmu_enable )
+ vpmu_set(vpmu, VPMU_RUNNING);
+ else
+ vpmu_reset(vpmu, VPMU_RUNNING);
+
+ if ( type != MSR_TYPE_GLOBAL )
+ {
+ u64 mask;
+ int inject_gp = 0;
+ switch ( type )
+ {
+ case MSR_TYPE_ARCH_CTRL: /* MSR_P6_EVNTSEL[0,...] */
+ mask = ~((1ull << 32) - 1);
+ if (msr_content & mask)
+ inject_gp = 1;
+ break;
+ case MSR_TYPE_CTRL: /* IA32_FIXED_CTR_CTRL */
+ if ( msr == MSR_IA32_DS_AREA )
+ break;
+ /* 4 bits per counter, currently 3 fixed counters implemented. */
+ mask = ~((1ull << (fixed_pmc_cnt * FIXED_CTR_CTRL_BITS)) - 1);
+ if (msr_content & mask)
+ inject_gp = 1;
+ break;
+ case MSR_TYPE_COUNTER: /* IA32_FIXED_CTR[0-2] */
+ mask = ~((1ull << core2_get_bitwidth_fix_count()) - 1);
+ if (msr_content & mask)
+ inject_gp = 1;
+ break;
+ }
+
+ if (inject_gp)
+ inject_trap(v, TRAP_gp_fault);
+ else
+ wrmsrl(msr, msr_content);
+ }
+ else
+ {
+ if ( has_hvm_container_domain(v->domain) )
+ vmx_write_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, msr_content);
+ else
+ wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, msr_content);
+ }
+
+ return 1;
+}
+
+static int core2_vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content)
+{
+ int type = -1, index = -1;
+ struct vcpu *v = current;
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ struct xen_pmu_intel_ctxt *core2_vpmu_cxt = NULL;
+
+ if ( core2_vpmu_msr_common_check(msr, &type, &index) )
+ {
+ core2_vpmu_cxt = vpmu->context;
+ switch ( msr )
+ {
+ case MSR_CORE_PERF_GLOBAL_OVF_CTRL:
+ *msr_content = 0;
+ break;
+ case MSR_CORE_PERF_GLOBAL_STATUS:
+ *msr_content = core2_vpmu_cxt->global_status;
+ break;
+ case MSR_CORE_PERF_GLOBAL_CTRL:
+ if ( has_hvm_container_domain(v->domain) )
+ vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, msr_content);
+ else
+ rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, *msr_content);
+ break;
+ default:
+ rdmsrl(msr, *msr_content);
+ }
+ }
+ else
+ {
+ /* Extension for BTS */
+ if ( msr == MSR_IA32_MISC_ENABLE )
+ {
+ if ( vpmu_is_set(vpmu, VPMU_CPU_HAS_BTS) )
+ *msr_content &= ~MSR_IA32_MISC_ENABLE_BTS_UNAVAIL;
+ }
+ else
+ return 0;
+ }
+
+ return 1;
+}
+
+static void core2_vpmu_do_cpuid(unsigned int input,
+ unsigned int *eax, unsigned int *ebx,
+ unsigned int *ecx, unsigned int *edx)
+{
+ if (input == 0x1)
+ {
+ struct vpmu_struct *vpmu = vcpu_vpmu(current);
+
+ if ( vpmu_is_set(vpmu, VPMU_CPU_HAS_DS) )
+ {
+ /* Switch on the 'Debug Store' feature in CPUID.EAX[1]:EDX[21] */
+ *edx |= cpufeat_mask(X86_FEATURE_DS);
+ if ( cpu_has(¤t_cpu_data, X86_FEATURE_DTES64) )
+ *ecx |= cpufeat_mask(X86_FEATURE_DTES64);
+ if ( cpu_has(¤t_cpu_data, X86_FEATURE_DSCPL) )
+ *ecx |= cpufeat_mask(X86_FEATURE_DSCPL);
+ }
+ }
+}
+
+/* Dump vpmu info on console, called in the context of keyhandler 'q'. */
+static void core2_vpmu_dump(const struct vcpu *v)
+{
+ const struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ int i;
+ const struct xen_pmu_intel_ctxt *core2_vpmu_cxt = NULL;
+ u64 val;
+ uint64_t *fixed_counters = vpmu_reg_pointer(core2_vpmu_cxt, fixed_counters);
+ struct xen_pmu_cntr_pair *xen_pmu_cntr_pair =
+ vpmu_reg_pointer(core2_vpmu_cxt, arch_counters);
+
+ if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
+ return;
+
+ if ( !vpmu_is_set(vpmu, VPMU_RUNNING) )
+ {
+ if ( vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
+ printk(" vPMU loaded\n");
+ else
+ printk(" vPMU allocated\n");
+ return;
+ }
+
+ printk(" vPMU running\n");
+ core2_vpmu_cxt = vpmu->context;
+
+ /* Print the contents of the counter and its configuration msr. */
+ for ( i = 0; i < arch_pmc_cnt; i++ )
+ printk(" general_%d: 0x%016lx ctrl: 0x%016lx\n",
+ i, xen_pmu_cntr_pair[i].counter, xen_pmu_cntr_pair[i].control);
+
+ /*
+ * The configuration of the fixed counter is 4 bits each in the
+ * MSR_CORE_PERF_FIXED_CTR_CTRL.
+ */
+ val = core2_vpmu_cxt->fixed_ctrl;
+ for ( i = 0; i < fixed_pmc_cnt; i++ )
+ {
+ printk(" fixed_%d: 0x%016lx ctrl: %#lx\n",
+ i, fixed_counters[i],
+ val & FIXED_CTR_CTRL_MASK);
+ val >>= FIXED_CTR_CTRL_BITS;
+ }
+}
+
+static int core2_vpmu_do_interrupt(struct cpu_user_regs *regs)
+{
+ struct vcpu *v = current;
+ u64 msr_content;
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ struct xen_pmu_intel_ctxt *core2_vpmu_cxt = vpmu->context;
+
+ rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS, msr_content);
+ if ( msr_content )
+ {
+ if ( is_pmc_quirk )
+ handle_pmc_quirk(msr_content);
+ core2_vpmu_cxt->global_status |= msr_content;
+ msr_content = 0xC000000700000000 | ((1 << arch_pmc_cnt) - 1);
+ wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, msr_content);
+ }
+ else
+ {
+ /* No PMC overflow but perhaps a Trace Message interrupt. */
+ __vmread(GUEST_IA32_DEBUGCTL, &msr_content);
+ if ( !(msr_content & IA32_DEBUGCTLMSR_TR) )
+ return 0;
+ }
+
+ return 1;
+}
+
+static int core2_vpmu_initialise(struct vcpu *v)
+{
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ u64 msr_content;
+ struct cpuinfo_x86 *c = ¤t_cpu_data;
+
+ if ( !(vpmu_features & XENPMU_FEATURE_INTEL_BTS) )
+ goto func_out;
+ /* Check the 'Debug Store' feature in the CPUID.EAX[1]:EDX[21] */
+ if ( cpu_has(c, X86_FEATURE_DS) )
+ {
+ if ( !cpu_has(c, X86_FEATURE_DTES64) )
+ {
+ printk(XENLOG_G_WARNING "CPU doesn't support 64-bit DS Area"
+ " - Debug Store disabled for d%d:v%d\n",
+ v->domain->domain_id, v->vcpu_id);
+ goto func_out;
+ }
+ vpmu_set(vpmu, VPMU_CPU_HAS_DS);
+ rdmsrl(MSR_IA32_MISC_ENABLE, msr_content);
+ if ( msr_content & MSR_IA32_MISC_ENABLE_BTS_UNAVAIL )
+ {
+ /* If BTS_UNAVAIL is set reset the DS feature. */
+ vpmu_reset(vpmu, VPMU_CPU_HAS_DS);
+ printk(XENLOG_G_WARNING "CPU has set BTS_UNAVAIL"
+ " - Debug Store disabled for d%d:v%d\n",
+ v->domain->domain_id, v->vcpu_id);
+ }
+ else
+ {
+ vpmu_set(vpmu, VPMU_CPU_HAS_BTS);
+ if ( !cpu_has(c, X86_FEATURE_DSCPL) )
+ printk(XENLOG_G_INFO
+ "vpmu: CPU doesn't support CPL-Qualified BTS\n");
+ printk("******************************************************\n");
+ printk("** WARNING: Emulation of BTS Feature is switched on **\n");
+ printk("** Using this processor feature in a virtualized **\n");
+ printk("** environment is not 100%% safe. **\n");
+ printk("** Setting the DS buffer address with wrong values **\n");
+ printk("** may lead to hypervisor hangs or crashes. **\n");
+ printk("** It is NOT recommended for production use! **\n");
+ printk("******************************************************\n");
+ }
+ }
+func_out:
+
+ arch_pmc_cnt = core2_get_arch_pmc_count();
+ fixed_pmc_cnt = core2_get_fixed_pmc_count();
+ check_pmc_quirk();
+
+ /* PV domains can allocate resources immediately */
+ if ( !has_hvm_container_domain(v->domain) && !core2_vpmu_alloc_resource(v) )
+ return 1;
+
+ return 0;
+}
+
+static void core2_vpmu_destroy(struct vcpu *v)
+{
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+
+ if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
+ return;
+
+ if ( has_hvm_container_domain(v->domain) )
+ {
+ xfree(vpmu->context);
+ if ( cpu_has_vmx_msr_bitmap )
+ core2_vpmu_unset_msr_bitmap(v->arch.hvm_vmx.msr_bitmap);
+ }
+
+ release_pmu_ownship(PMU_OWNER_HVM);
+ vpmu->context = NULL;
+ vpmu_clear(vpmu);
+}
+
+struct arch_vpmu_ops core2_vpmu_ops = {
+ .do_wrmsr = core2_vpmu_do_wrmsr,
+ .do_rdmsr = core2_vpmu_do_rdmsr,
+ .do_interrupt = core2_vpmu_do_interrupt,
+ .do_cpuid = core2_vpmu_do_cpuid,
+ .arch_vpmu_destroy = core2_vpmu_destroy,
+ .arch_vpmu_save = core2_vpmu_save,
+ .arch_vpmu_load = core2_vpmu_load,
+ .arch_vpmu_dump = core2_vpmu_dump
+};
+
+static void core2_no_vpmu_do_cpuid(unsigned int input,
+ unsigned int *eax, unsigned int *ebx,
+ unsigned int *ecx, unsigned int *edx)
+{
+ /*
+ * As in this case the vpmu is not enabled reset some bits in the
+ * architectural performance monitoring related part.
+ */
+ if ( input == 0xa )
+ {
+ *eax &= ~PMU_VERSION_MASK;
+ *eax &= ~PMU_GENERAL_NR_MASK;
+ *eax &= ~PMU_GENERAL_WIDTH_MASK;
+
+ *edx &= ~PMU_FIXED_NR_MASK;
+ *edx &= ~PMU_FIXED_WIDTH_MASK;
+ }
+}
+
+/*
+ * If its a vpmu msr set it to 0.
+ */
+static int core2_no_vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content)
+{
+ int type = -1, index = -1;
+ if ( !is_core2_vpmu_msr(msr, &type, &index) )
+ return 0;
+ *msr_content = 0;
+ return 1;
+}
+
+/*
+ * These functions are used in case vpmu is not enabled.
+ */
+struct arch_vpmu_ops core2_no_vpmu_ops = {
+ .do_rdmsr = core2_no_vpmu_do_rdmsr,
+ .do_cpuid = core2_no_vpmu_do_cpuid,
+};
+
+int vmx_vpmu_initialise(struct vcpu *v)
+{
+ struct vpmu_struct *vpmu = vcpu_vpmu(v);
+ uint8_t family = current_cpu_data.x86;
+ uint8_t cpu_model = current_cpu_data.x86_model;
+ int ret = 0;
+
+ vpmu->arch_vpmu_ops = &core2_no_vpmu_ops;
+ if ( vpmu_mode == XENPMU_MODE_OFF )
+ return 0;
+
+ if ( family == 6 )
+ {
+ u64 caps;
+
+ rdmsrl(MSR_IA32_PERF_CAPABILITIES, caps);
+ full_width_write = (caps >> 13) & 1;
+
+ switch ( cpu_model )
+ {
+ /* Core2: */
+ case 0x0f: /* original 65 nm celeron/pentium/core2/xeon, "Merom"/"Conroe" */
+ case 0x16: /* single-core 65 nm celeron/core2solo "Merom-L"/"Conroe-L" */
+ case 0x17: /* 45 nm celeron/core2/xeon "Penryn"/"Wolfdale" */
+ case 0x1d: /* six-core 45 nm xeon "Dunnington" */
+
+ case 0x2a: /* SandyBridge */
+ case 0x2d: /* SandyBridge, "Romley-EP" */
+
+ /* Nehalem: */
+ case 0x1a: /* 45 nm nehalem, "Bloomfield" */
+ case 0x1e: /* 45 nm nehalem, "Lynnfield", "Clarksfield", "Jasper Forest" */
+ case 0x2e: /* 45 nm nehalem-ex, "Beckton" */
+
+ /* Westmere: */
+ case 0x25: /* 32 nm nehalem, "Clarkdale", "Arrandale" */
+ case 0x2c: /* 32 nm nehalem, "Gulftown", "Westmere-EP" */
+ case 0x27: /* 32 nm Westmere-EX */
+
+ case 0x3a: /* IvyBridge */
+ case 0x3e: /* IvyBridge EP */
+
+ /* Haswell: */
+ case 0x3c:
+ case 0x3f:
+ case 0x45:
+ case 0x46:
+ ret = core2_vpmu_initialise(v);
+ if ( !ret )
+ vpmu->arch_vpmu_ops = &core2_vpmu_ops;
+ return ret;
+ }
+ }
+
+ printk("VPMU: Initialization failed. "
+ "Intel processor family %d model %d has not "
+ "been supported\n", family, cpu_model);
+ return -EINVAL;
+}
+
diff --git a/xen/include/asm-x86/hvm/vmx/vmcs.h b/xen/include/asm-x86/hvm/vmx/vmcs.h
index ed81cfb..d27df39 100644
--- a/xen/include/asm-x86/hvm/vmx/vmcs.h
+++ b/xen/include/asm-x86/hvm/vmx/vmcs.h
@@ -20,7 +20,7 @@
#define __ASM_X86_HVM_VMX_VMCS_H__
#include <asm/hvm/io.h>
-#include <asm/hvm/vpmu.h>
+#include <asm/vpmu.h>
#include <irq_vectors.h>
extern void vmcs_dump_vcpu(struct vcpu *v);
diff --git a/xen/include/asm-x86/hvm/vpmu.h b/xen/include/asm-x86/hvm/vpmu.h
deleted file mode 100644
index 0f3de14..0000000
--- a/xen/include/asm-x86/hvm/vpmu.h
+++ /dev/null
@@ -1,99 +0,0 @@
-/*
- * vpmu.h: PMU virtualization for HVM domain.
- *
- * Copyright (c) 2007, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307 USA.
- *
- * Author: Haitao Shan <haitao.shan@intel.com>
- */
-
-#ifndef __ASM_X86_HVM_VPMU_H_
-#define __ASM_X86_HVM_VPMU_H_
-
-#include <public/pmu.h>
-
-#define vcpu_vpmu(vcpu) (&(vcpu)->arch.vpmu)
-#define vpmu_vcpu(vpmu) container_of(vpmu, struct vcpu, arch.vpmu)
-
-#define MSR_TYPE_COUNTER 0
-#define MSR_TYPE_CTRL 1
-#define MSR_TYPE_GLOBAL 2
-#define MSR_TYPE_ARCH_COUNTER 3
-#define MSR_TYPE_ARCH_CTRL 4
-
-/* Start of PMU register bank */
-#define vpmu_reg_pointer(ctxt, offset) ((void *)((uintptr_t)ctxt + \
- (uintptr_t)ctxt->offset))
-
-/* Arch specific operations shared by all vpmus */
-struct arch_vpmu_ops {
- int (*do_wrmsr)(unsigned int msr, uint64_t msr_content);
- int (*do_rdmsr)(unsigned int msr, uint64_t *msr_content);
- int (*do_interrupt)(struct cpu_user_regs *regs);
- void (*do_cpuid)(unsigned int input,
- unsigned int *eax, unsigned int *ebx,
- unsigned int *ecx, unsigned int *edx);
- void (*arch_vpmu_destroy)(struct vcpu *v);
- int (*arch_vpmu_save)(struct vcpu *v);
- void (*arch_vpmu_load)(struct vcpu *v);
- void (*arch_vpmu_dump)(const struct vcpu *);
-};
-
-int vmx_vpmu_initialise(struct vcpu *);
-int svm_vpmu_initialise(struct vcpu *);
-
-struct vpmu_struct {
- u32 flags;
- u32 last_pcpu;
- u32 hw_lapic_lvtpc;
- void *context;
- struct arch_vpmu_ops *arch_vpmu_ops;
- xen_pmu_data_t *xenpmu_data;
-};
-
-/* VPMU states */
-#define VPMU_CONTEXT_ALLOCATED 0x1
-#define VPMU_CONTEXT_LOADED 0x2
-#define VPMU_RUNNING 0x4
-#define VPMU_CONTEXT_SAVE 0x8 /* Force context save */
-#define VPMU_FROZEN 0x10 /* Stop counters while VCPU is not running */
-#define VPMU_PASSIVE_DOMAIN_ALLOCATED 0x20
-
-#define vpmu_set(_vpmu, _x) ((_vpmu)->flags |= (_x))
-#define vpmu_reset(_vpmu, _x) ((_vpmu)->flags &= ~(_x))
-#define vpmu_is_set(_vpmu, _x) ((_vpmu)->flags & (_x))
-#define vpmu_is_set_all(_vpmu, _x) (((_vpmu)->flags & (_x)) == (_x))
-#define vpmu_clear(_vpmu) ((_vpmu)->flags = 0)
-
-void vpmu_lvtpc_update(uint32_t val);
-int vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content);
-int vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content);
-int vpmu_do_interrupt(struct cpu_user_regs *regs);
-void vpmu_do_cpuid(unsigned int input, unsigned int *eax, unsigned int *ebx,
- unsigned int *ecx, unsigned int *edx);
-void vpmu_initialise(struct vcpu *v);
-void vpmu_destroy(struct vcpu *v);
-void vpmu_save(struct vcpu *v);
-void vpmu_load(struct vcpu *v);
-void vpmu_dump(struct vcpu *v);
-
-extern int acquire_pmu_ownership(int pmu_ownership);
-extern void release_pmu_ownership(int pmu_ownership);
-
-extern uint64_t vpmu_mode;
-extern uint64_t vpmu_features;
-
-#endif /* __ASM_X86_HVM_VPMU_H_*/
-
diff --git a/xen/include/asm-x86/vpmu.h b/xen/include/asm-x86/vpmu.h
new file mode 100644
index 0000000..0f3de14
--- /dev/null
+++ b/xen/include/asm-x86/vpmu.h
@@ -0,0 +1,99 @@
+/*
+ * vpmu.h: PMU virtualization for HVM domain.
+ *
+ * Copyright (c) 2007, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Author: Haitao Shan <haitao.shan@intel.com>
+ */
+
+#ifndef __ASM_X86_HVM_VPMU_H_
+#define __ASM_X86_HVM_VPMU_H_
+
+#include <public/pmu.h>
+
+#define vcpu_vpmu(vcpu) (&(vcpu)->arch.vpmu)
+#define vpmu_vcpu(vpmu) container_of(vpmu, struct vcpu, arch.vpmu)
+
+#define MSR_TYPE_COUNTER 0
+#define MSR_TYPE_CTRL 1
+#define MSR_TYPE_GLOBAL 2
+#define MSR_TYPE_ARCH_COUNTER 3
+#define MSR_TYPE_ARCH_CTRL 4
+
+/* Start of PMU register bank */
+#define vpmu_reg_pointer(ctxt, offset) ((void *)((uintptr_t)ctxt + \
+ (uintptr_t)ctxt->offset))
+
+/* Arch specific operations shared by all vpmus */
+struct arch_vpmu_ops {
+ int (*do_wrmsr)(unsigned int msr, uint64_t msr_content);
+ int (*do_rdmsr)(unsigned int msr, uint64_t *msr_content);
+ int (*do_interrupt)(struct cpu_user_regs *regs);
+ void (*do_cpuid)(unsigned int input,
+ unsigned int *eax, unsigned int *ebx,
+ unsigned int *ecx, unsigned int *edx);
+ void (*arch_vpmu_destroy)(struct vcpu *v);
+ int (*arch_vpmu_save)(struct vcpu *v);
+ void (*arch_vpmu_load)(struct vcpu *v);
+ void (*arch_vpmu_dump)(const struct vcpu *);
+};
+
+int vmx_vpmu_initialise(struct vcpu *);
+int svm_vpmu_initialise(struct vcpu *);
+
+struct vpmu_struct {
+ u32 flags;
+ u32 last_pcpu;
+ u32 hw_lapic_lvtpc;
+ void *context;
+ struct arch_vpmu_ops *arch_vpmu_ops;
+ xen_pmu_data_t *xenpmu_data;
+};
+
+/* VPMU states */
+#define VPMU_CONTEXT_ALLOCATED 0x1
+#define VPMU_CONTEXT_LOADED 0x2
+#define VPMU_RUNNING 0x4
+#define VPMU_CONTEXT_SAVE 0x8 /* Force context save */
+#define VPMU_FROZEN 0x10 /* Stop counters while VCPU is not running */
+#define VPMU_PASSIVE_DOMAIN_ALLOCATED 0x20
+
+#define vpmu_set(_vpmu, _x) ((_vpmu)->flags |= (_x))
+#define vpmu_reset(_vpmu, _x) ((_vpmu)->flags &= ~(_x))
+#define vpmu_is_set(_vpmu, _x) ((_vpmu)->flags & (_x))
+#define vpmu_is_set_all(_vpmu, _x) (((_vpmu)->flags & (_x)) == (_x))
+#define vpmu_clear(_vpmu) ((_vpmu)->flags = 0)
+
+void vpmu_lvtpc_update(uint32_t val);
+int vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content);
+int vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content);
+int vpmu_do_interrupt(struct cpu_user_regs *regs);
+void vpmu_do_cpuid(unsigned int input, unsigned int *eax, unsigned int *ebx,
+ unsigned int *ecx, unsigned int *edx);
+void vpmu_initialise(struct vcpu *v);
+void vpmu_destroy(struct vcpu *v);
+void vpmu_save(struct vcpu *v);
+void vpmu_load(struct vcpu *v);
+void vpmu_dump(struct vcpu *v);
+
+extern int acquire_pmu_ownership(int pmu_ownership);
+extern void release_pmu_ownership(int pmu_ownership);
+
+extern uint64_t vpmu_mode;
+extern uint64_t vpmu_features;
+
+#endif /* __ASM_X86_HVM_VPMU_H_*/
+
--
1.8.3.1
^ permalink raw reply related [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support
2014-04-23 12:50 [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Boris Ostrovsky
` (16 preceding siblings ...)
2014-04-23 12:50 ` [PATCH v5 RESEND 17/17] x86/VPMU: Move VPMU files up from hvm/ directory Boris Ostrovsky
@ 2014-04-24 9:22 ` Tian, Kevin
2014-04-26 8:55 ` Tian, Kevin
18 siblings, 0 replies; 44+ messages in thread
From: Tian, Kevin @ 2014-04-24 9:22 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
> Sent: Wednesday, April 23, 2014 8:50 PM
>
> (Resending v5 per Kevin's request)
Hi, Boris, thanks for resending. will spend some time to review and
get back my comments soon.
Thanks
Kevin
>
>
> Here is the fifth version of PV(H) PMU patches.
>
>
> Changes in v5:
>
> * Dropped patch number 2 ("Stop AMD counters when called from
> vpmu_save_force()")
> as no longer needed
> * Added patch number 2 that marks context as loaded before PMU registers
> are
> loaded. This prevents situation where a PMU interrupt may occur while
> context
> is still viewed as not loaded. (This is really a bug fix for exsiting VPMU
> code)
> * Renamed xenpmu.h files to pmu.h
> * More careful use of is_pv_domain(), is_hvm_domain(, is_pvh_domain and
> has_hvm_container_domain(). Also explicitly disabled support for PVH until
> patch 16 to make distinction between usage of the above macros more
> clear.
> * Added support for disabling VPMU support during runtime.
> * Disable VPMUs for non-privileged domains when switching to privileged
> profiling mode
> * Added ARM stub for xen_arch_pmu_t
> * Separated vpmu_mode from vpmu_features
> * Moved CS register query to make sure we use appropriate query mechanism
> for
> various guest types.
> * LVTPC is now set from value in shared area, not copied from dom0
> * Various code and comments cleanup as suggested by Jan.
>
> Changes in v4:
>
> * Added support for PVH guests:
> o changes in pvpmu_init() to accommodate both PV and PVH guests, still in
> patch 10
> o more careful use of is_hvm_domain
> o Additional patch (16)
> * Moved HVM interrupt handling out of vpmu_do_interrupt() for NMI-safe
> handling
> * Fixed dom0's VCPU selection in privileged mode
> * Added a cast in register copy for 32-bit PV guests cpu_user_regs_t in
> vpmu_do_interrupt.
> (don't want to expose compat_cpu_user_regs in a public header)
> * Renamed public structures by prefixing them with "xen_"
> * Added an entry for xenpf_symdata in xlat.lst
> * Fixed pv_cpuid check for vpmu-specific cpuid adjustments
> * Varios code style fixes
> * Eliminated anonymous unions
> * Added more verbiage to NMI patch description
>
>
> Changes in v3:
>
> * Moved PMU MSR banks out from architectural context data structures to
> allow
> for future expansion without protocol changes
> * PMU interrupts can be either NMIs or regular vector interrupts (the latter
> is the default)
> * Context is now marked as PMU_CACHED by the hypervisor code to avoid
> certain
> race conditions with the guest
> * Fixed races with PV guest in MSR access handlers
> * More Intel VPMU cleanup
> * Moved NMI-unsafe code from NMI handler
> * Dropped changes to vcpu->is_running
> * Added LVTPC apic handling (cached for PV guests)
> * Separated privileged profiling mode into a standalone patch
> * Separated NMI handling into a standalone patch
>
>
> Changes in v2:
>
> * Xen symbols are exported as data structure (as opoosed to a set of
> formatted
> strings in v1). Even though one symbol per hypercall is returned performance
> appears to be acceptable: reading whole file from dom0 userland takes on
> average
> about twice as long as reading /proc/kallsyms
> * More cleanup of Intel VPMU code to simplify publicly exported structures
> * There is an architecture-independent and x86-specific public include files
> (ARM
> has a stub)
> * General cleanup of public include files to make them more presentable (and
> to make auto doc generation better)
> * Setting of vcpu->is_running is now done on ARM in schedule_tail as well
> (making
> changes to common/schedule.c architecture-independent). Note that this is
> not
> tested since I don't have access to ARM hardware.
> * PCPU ID of interrupted processor is now passed to PV guest
>
>
> The following patch series adds PMU support in Xen for PV(H)
> guests. There is a companion patchset for Linux kernel. In addition,
> another set of changes will be provided (later) for userland perf
> code.
>
> This version has following limitations:
> * For accurate profiling of dom0/Xen dom0 VCPUs should be pinned.
> * Hypervisor code is only profiled on processors that have running dom0
> VCPUs
> on them.
> * No backtrace support.
> * Will fail to load under XSM: we ran out of bits in permissions vector and
> this needs to be fixed separately
>
> A few notes that may help reviewing:
>
> * A shared data structure (xenpmu_data_t) between each PV VPCU and
> hypervisor
> CPU is used for passing registers' values as well as PMU state at the time of
> PMU interrupt.
> * PMU interrupts are taken by hypervisor either as NMIs or regular vector
> interrupts for both HVM and PV(H). The interrupts are sent as NMIs to HVM
> guests
> and as virtual interrupts to PV(H) guests
> * PV guest's interrupt handler does not read/write PMU MSRs directly. Instead,
> it
> accesses xenpmu_data_t and flushes it to HW it before returning.
> * PMU mode is controlled at runtime via
> /sys/hypervisor/pmu/pmu/{pmu_mode,pmu_flags}
> in addition to 'vpmu' boot option (which is preserved for back compatibility).
> The following modes are provided:
> * disable: VPMU is off
> * enable: VPMU is on. Guests can profile themselves, dom0 profiles itself
> and Xen
> * priv_enable: dom0 only profiling. dom0 collects samples for everyone.
> Sampling
> in guests is suspended.
> * /proc/xen/xensyms file exports hypervisor's symbols to dom0 (similar to
> /proc/kallsyms)
> * VPMU infrastructure is now used for HVM, PV and PVH and therefore has
> been moved
> up from hvm subtree
>
>
> Boris Ostrovsky (17):
> common/symbols: Export hypervisor symbols to privileged guest
> VPMU: Mark context LOADED before registers are loaded
> x86/VPMU: Minor VPMU cleanup
> intel/VPMU: Clean up Intel VPMU code
> x86/VPMU: Handle APIC_LVTPC accesses
> intel/VPMU: MSR_CORE_PERF_GLOBAL_CTRL should be initialized to zero
> x86/VPMU: Add public xenpmu.h
> x86/VPMU: Make vpmu not HVM-specific
> x86/VPMU: Interface for setting PMU mode and flags
> x86/VPMU: Initialize PMU for PV guests
> x86/VPMU: Add support for PMU register handling on PV guests
> x86/VPMU: Handle PMU interrupts for PV guests
> x86/VPMU: Add privileged PMU mode
> x86/VPMU: Save VPMU state for PV guests during context switch
> x86/VPMU: NMI-based VPMU support
> x86/VPMU: Suport for PVH guests
> x86/VPMU: Move VPMU files up from hvm/ directory
>
> xen/arch/x86/Makefile | 1 +
> xen/arch/x86/domain.c | 15 +-
> xen/arch/x86/hvm/Makefile | 1 -
> xen/arch/x86/hvm/hvm.c | 3 +-
> xen/arch/x86/hvm/svm/Makefile | 1 -
> xen/arch/x86/hvm/svm/svm.c | 6 +-
> xen/arch/x86/hvm/svm/vpmu.c | 494 ----------------
> xen/arch/x86/hvm/vlapic.c | 5 +-
> xen/arch/x86/hvm/vmx/Makefile | 1 -
> xen/arch/x86/hvm/vmx/vmcs.c | 55 ++
> xen/arch/x86/hvm/vmx/vmx.c | 6 +-
> xen/arch/x86/hvm/vmx/vpmu_core2.c | 931 ------------------------------
> xen/arch/x86/hvm/vpmu.c | 266 ---------
> xen/arch/x86/oprofile/op_model_ppro.c | 8 +-
> xen/arch/x86/platform_hypercall.c | 18 +
> xen/arch/x86/traps.c | 35 +-
> xen/arch/x86/vpmu.c | 720
> +++++++++++++++++++++++
> xen/arch/x86/vpmu_amd.c | 509 +++++++++++++++++
> xen/arch/x86/vpmu_intel.c | 940
> +++++++++++++++++++++++++++++++
> xen/arch/x86/x86_64/compat/entry.S | 4 +
> xen/arch/x86/x86_64/entry.S | 4 +
> xen/arch/x86/x86_64/platform_hypercall.c | 2 +
> xen/common/event_channel.c | 1 +
> xen/common/symbols.c | 50 +-
> xen/common/vsprintf.c | 2 +-
> xen/include/asm-x86/domain.h | 2 +
> xen/include/asm-x86/hvm/vcpu.h | 3 -
> xen/include/asm-x86/hvm/vmx/vmcs.h | 4 +-
> xen/include/asm-x86/hvm/vmx/vpmu_core2.h | 51 --
> xen/include/asm-x86/hvm/vpmu.h | 104 ----
> xen/include/asm-x86/vpmu.h | 99 ++++
> xen/include/public/arch-arm.h | 3 +
> xen/include/public/arch-x86/pmu.h | 63 +++
> xen/include/public/platform.h | 16 +
> xen/include/public/pmu.h | 99 ++++
> xen/include/public/xen.h | 2 +
> xen/include/xen/hypercall.h | 4 +
> xen/include/xen/softirq.h | 1 +
> xen/include/xen/symbols.h | 6 +-
> xen/include/xlat.lst | 1 +
> 40 files changed, 2661 insertions(+), 1875 deletions(-)
> delete mode 100644 xen/arch/x86/hvm/svm/vpmu.c
> delete mode 100644 xen/arch/x86/hvm/vmx/vpmu_core2.c
> delete mode 100644 xen/arch/x86/hvm/vpmu.c
> create mode 100644 xen/arch/x86/vpmu.c
> create mode 100644 xen/arch/x86/vpmu_amd.c
> create mode 100644 xen/arch/x86/vpmu_intel.c
> delete mode 100644 xen/include/asm-x86/hvm/vmx/vpmu_core2.h
> delete mode 100644 xen/include/asm-x86/hvm/vpmu.h
> create mode 100644 xen/include/asm-x86/vpmu.h
> create mode 100644 xen/include/public/arch-x86/pmu.h
> create mode 100644 xen/include/public/pmu.h
>
> --
> 1.8.3.1
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 02/17] VPMU: Mark context LOADED before registers are loaded
2014-04-23 12:50 ` [PATCH v5 RESEND 02/17] VPMU: Mark context LOADED before registers are loaded Boris Ostrovsky
@ 2014-04-26 8:20 ` Tian, Kevin
0 siblings, 0 replies; 44+ messages in thread
From: Tian, Kevin @ 2014-04-26 8:20 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
> Sent: Wednesday, April 23, 2014 8:50 PM
>
> Because a PMU interrupt may be generated as soon as PMU registers are
> loaded (or,
> more precisely, as soon as HW PMU is "armed") we don't want to delay
> marking
> context as LOADED until after registers are loaded. Otherwise during interrupt
> handling VPMU_CONTEXT_LOADED may not be set and this could be
> confusing.
>
> (Technically, only SVM needs this change right now since VMX will "arm" PMU
> later,
> during VMRUN when global control register is loaded from VMCS. However,
> both
> AMD and Intel code will require this patch when we introduce PV VPMU).
>
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Acked-by: Kevin Tian <kevin.tian@intel.com>
> ---
> xen/arch/x86/hvm/svm/vpmu.c | 2 ++
> xen/arch/x86/hvm/vmx/vpmu_core2.c | 2 ++
> xen/arch/x86/hvm/vpmu.c | 3 +--
> 3 files changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/xen/arch/x86/hvm/svm/vpmu.c b/xen/arch/x86/hvm/svm/vpmu.c
> index 66a3815..3ac7d53 100644
> --- a/xen/arch/x86/hvm/svm/vpmu.c
> +++ b/xen/arch/x86/hvm/svm/vpmu.c
> @@ -203,6 +203,8 @@ static void amd_vpmu_load(struct vcpu *v)
> return;
> }
>
> + vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
> +
> context_load(v);
> }
>
> diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c
> b/xen/arch/x86/hvm/vmx/vpmu_core2.c
> index ee26362..8aa7cb2 100644
> --- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
> +++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
> @@ -369,6 +369,8 @@ static void core2_vpmu_load(struct vcpu *v)
> if ( vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
> return;
>
> + vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
> +
> __core2_vpmu_load(v);
> }
>
> diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
> index 21fbaba..63765fa 100644
> --- a/xen/arch/x86/hvm/vpmu.c
> +++ b/xen/arch/x86/hvm/vpmu.c
> @@ -211,10 +211,9 @@ void vpmu_load(struct vcpu *v)
> if ( vpmu->arch_vpmu_ops &&
> vpmu->arch_vpmu_ops->arch_vpmu_load )
> {
> apic_write_around(APIC_LVTPC, vpmu->hw_lapic_lvtpc);
> + /* Arch code needs to set VPMU_CONTEXT_LOADED */
> vpmu->arch_vpmu_ops->arch_vpmu_load(v);
> }
> -
> - vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
> }
>
> void vpmu_initialise(struct vcpu *v)
> --
> 1.8.3.1
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 03/17] x86/VPMU: Minor VPMU cleanup
2014-04-23 12:50 ` [PATCH v5 RESEND 03/17] x86/VPMU: Minor VPMU cleanup Boris Ostrovsky
@ 2014-04-26 8:20 ` Tian, Kevin
2014-04-28 13:52 ` Boris Ostrovsky
0 siblings, 1 reply; 44+ messages in thread
From: Tian, Kevin @ 2014-04-26 8:20 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
> Sent: Wednesday, April 23, 2014 8:50 PM
>
> Update macros that modify VPMU flags to allow changing multiple bits at
> once.
>
> Make sure that we only touch MSR bitmap on HVM guests (both VMX and
> SVM). This
> is needed by subsequent PMU patches.
>
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
> ---
> xen/arch/x86/hvm/svm/vpmu.c | 14 +++++++++-----
> xen/arch/x86/hvm/vmx/vpmu_core2.c | 9 +++------
> xen/arch/x86/hvm/vpmu.c | 3 +--
> xen/include/asm-x86/hvm/vpmu.h | 9 +++++----
> 4 files changed, 18 insertions(+), 17 deletions(-)
>
> diff --git a/xen/arch/x86/hvm/svm/vpmu.c b/xen/arch/x86/hvm/svm/vpmu.c
> index 3ac7d53..3666915 100644
> --- a/xen/arch/x86/hvm/svm/vpmu.c
> +++ b/xen/arch/x86/hvm/svm/vpmu.c
> @@ -244,7 +244,8 @@ static int amd_vpmu_save(struct vcpu *v)
>
> context_save(v);
>
> - if ( !vpmu_is_set(vpmu, VPMU_RUNNING) && ctx->msr_bitmap_set )
> + if ( is_hvm_domain(v->domain) &&
> + !vpmu_is_set(vpmu, VPMU_RUNNING) && ctx->msr_bitmap_set )
> amd_vpmu_unset_msr_bitmap(v);
>
> return 1;
> @@ -284,7 +285,7 @@ static int amd_vpmu_do_wrmsr(unsigned int msr,
> uint64_t msr_content)
> struct vpmu_struct *vpmu = vcpu_vpmu(v);
>
> /* For all counters, enable guest only mode for HVM guest */
> - if ( (get_pmu_reg_type(msr) == MSR_TYPE_CTRL) &&
> + if ( is_hvm_domain(v->domain) && (get_pmu_reg_type(msr) ==
> MSR_TYPE_CTRL) &&
> !(is_guest_mode(msr_content)) )
> {
> set_guest_mode(msr_content);
> @@ -300,7 +301,8 @@ static int amd_vpmu_do_wrmsr(unsigned int msr,
> uint64_t msr_content)
> apic_write(APIC_LVTPC, PMU_APIC_VECTOR);
> vpmu->hw_lapic_lvtpc = PMU_APIC_VECTOR;
>
> - if ( !((struct amd_vpmu_context
> *)vpmu->context)->msr_bitmap_set )
> + if ( is_hvm_domain(v->domain) &&
> + !((struct amd_vpmu_context
> *)vpmu->context)->msr_bitmap_set )
> amd_vpmu_set_msr_bitmap(v);
> }
>
> @@ -311,7 +313,8 @@ static int amd_vpmu_do_wrmsr(unsigned int msr,
> uint64_t msr_content)
> apic_write(APIC_LVTPC, PMU_APIC_VECTOR | APIC_LVT_MASKED);
> vpmu->hw_lapic_lvtpc = PMU_APIC_VECTOR | APIC_LVT_MASKED;
> vpmu_reset(vpmu, VPMU_RUNNING);
> - if ( ((struct amd_vpmu_context
> *)vpmu->context)->msr_bitmap_set )
> + if ( is_hvm_domain(v->domain) &&
> + ((struct amd_vpmu_context
> *)vpmu->context)->msr_bitmap_set )
> amd_vpmu_unset_msr_bitmap(v);
> release_pmu_ownship(PMU_OWNER_HVM);
> }
> @@ -403,7 +406,8 @@ static void amd_vpmu_destroy(struct vcpu *v)
> if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
> return;
>
> - if ( ((struct amd_vpmu_context *)vpmu->context)->msr_bitmap_set )
> + if ( is_hvm_domain(v->domain) &&
> + ((struct amd_vpmu_context *)vpmu->context)->msr_bitmap_set )
> amd_vpmu_unset_msr_bitmap(v);
>
> xfree(vpmu->context);
> diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c
> b/xen/arch/x86/hvm/vmx/vpmu_core2.c
> index 8aa7cb2..1e32ff3 100644
> --- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
> +++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
> @@ -326,10 +326,7 @@ static int core2_vpmu_save(struct vcpu *v)
> {
> struct vpmu_struct *vpmu = vcpu_vpmu(v);
>
> - if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_SAVE) )
> - return 0;
> -
> - if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
> + if ( !vpmu_is_set_all(vpmu, VPMU_CONTEXT_SAVE |
> VPMU_CONTEXT_LOADED) )
> return 0;
>
> __core2_vpmu_save(v);
right below you miss a bitmap check:
/* Unset PMU MSR bitmap to trap lazy load. */
if ( !vpmu_is_set(vpmu, VPMU_RUNNING) && cpu_has_vmx_msr_bitmap )
core2_vpmu_unset_msr_bitmap(v->arch.hvm_vmx.msr_bitmap);
> @@ -448,7 +445,7 @@ static int core2_vpmu_msr_common_check(u32
> msr_index, int *type, int *index)
> {
> __core2_vpmu_load(current);
> vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
> - if ( cpu_has_vmx_msr_bitmap )
> + if ( cpu_has_vmx_msr_bitmap &&
> is_hvm_domain(current->domain) )
>
> core2_vpmu_set_msr_bitmap(current->arch.hvm_vmx.msr_bitmap);
> }
> return 1;
> @@ -815,7 +812,7 @@ static void core2_vpmu_destroy(struct vcpu *v)
> return;
> xfree(core2_vpmu_cxt->pmu_enable);
> xfree(vpmu->context);
> - if ( cpu_has_vmx_msr_bitmap )
> + if ( cpu_has_vmx_msr_bitmap && is_hvm_domain(v->domain) )
> core2_vpmu_unset_msr_bitmap(v->arch.hvm_vmx.msr_bitmap);
> release_pmu_ownship(PMU_OWNER_HVM);
> vpmu_reset(vpmu, VPMU_CONTEXT_ALLOCATED);
> diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
> index 63765fa..a48dae2 100644
> --- a/xen/arch/x86/hvm/vpmu.c
> +++ b/xen/arch/x86/hvm/vpmu.c
> @@ -143,8 +143,7 @@ void vpmu_save(struct vcpu *v)
> struct vpmu_struct *vpmu = vcpu_vpmu(v);
> int pcpu = smp_processor_id();
>
> - if ( !(vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) &&
> - vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED)) )
> + if ( !vpmu_is_set_all(vpmu, VPMU_CONTEXT_ALLOCATED |
> VPMU_CONTEXT_LOADED) )
> return;
>
> vpmu->last_pcpu = pcpu;
> diff --git a/xen/include/asm-x86/hvm/vpmu.h
> b/xen/include/asm-x86/hvm/vpmu.h
> index 40f63fb..2a713be 100644
> --- a/xen/include/asm-x86/hvm/vpmu.h
> +++ b/xen/include/asm-x86/hvm/vpmu.h
> @@ -81,10 +81,11 @@ struct vpmu_struct {
> #define VPMU_CPU_HAS_BTS 0x200 /* Has Branch
> Trace Store */
>
>
> -#define vpmu_set(_vpmu, _x) ((_vpmu)->flags |= (_x))
> -#define vpmu_reset(_vpmu, _x) ((_vpmu)->flags &= ~(_x))
> -#define vpmu_is_set(_vpmu, _x) ((_vpmu)->flags & (_x))
> -#define vpmu_clear(_vpmu) ((_vpmu)->flags = 0)
> +#define vpmu_set(_vpmu, _x) ((_vpmu)->flags |= (_x))
> +#define vpmu_reset(_vpmu, _x) ((_vpmu)->flags &= ~(_x))
> +#define vpmu_is_set(_vpmu, _x) ((_vpmu)->flags & (_x))
> +#define vpmu_is_set_all(_vpmu, _x) (((_vpmu)->flags & (_x)) == (_x))
> +#define vpmu_clear(_vpmu) ((_vpmu)->flags = 0)
>
> int vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content);
> int vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content);
> --
> 1.8.3.1
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 04/17] intel/VPMU: Clean up Intel VPMU code
2014-04-23 12:50 ` [PATCH v5 RESEND 04/17] intel/VPMU: Clean up Intel VPMU code Boris Ostrovsky
@ 2014-04-26 8:20 ` Tian, Kevin
2014-04-28 14:00 ` Boris Ostrovsky
0 siblings, 1 reply; 44+ messages in thread
From: Tian, Kevin @ 2014-04-26 8:20 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
> Sent: Wednesday, April 23, 2014 8:50 PM
>
> Remove struct pmumsr and core2_pmu_enable. Replace static MSR structures
> with
> fields in core2_vpmu_context.
>
> Call core2_get_pmc_count() once, during initialization.
>
> Properly clean up when core2_vpmu_alloc_resource() fails and add routines
> to remove MSRs from VMCS.
>
>
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
it's a good cleanup in general. ack with two small comments later.
Acked-by: Kevin Tian <kevin.tian@intel.com>
> ---
> xen/arch/x86/hvm/vmx/vmcs.c | 55 ++++++
> xen/arch/x86/hvm/vmx/vpmu_core2.c | 310
> ++++++++++++++-----------------
> xen/include/asm-x86/hvm/vmx/vmcs.h | 2 +
> xen/include/asm-x86/hvm/vmx/vpmu_core2.h | 19 --
> 4 files changed, 199 insertions(+), 187 deletions(-)
>
> diff --git a/xen/arch/x86/hvm/vmx/vmcs.c b/xen/arch/x86/hvm/vmx/vmcs.c
> index 44f33cb..5f86b17 100644
> --- a/xen/arch/x86/hvm/vmx/vmcs.c
> +++ b/xen/arch/x86/hvm/vmx/vmcs.c
> @@ -1205,6 +1205,34 @@ int vmx_add_guest_msr(u32 msr)
> return 0;
> }
>
> +void vmx_rm_guest_msr(u32 msr)
> +{
> + struct vcpu *curr = current;
> + unsigned int idx, msr_count = curr->arch.hvm_vmx.msr_count;
> + struct vmx_msr_entry *msr_area = curr->arch.hvm_vmx.msr_area;
> +
> + if ( msr_area == NULL )
> + return;
> +
> + for ( idx = 0; idx < msr_count; idx++ )
> + if ( msr_area[idx].index == msr )
> + break;
> +
> + if ( idx == msr_count )
> + return;
> +
> + for ( ; idx < msr_count - 1; idx++ )
> + {
> + msr_area[idx].index = msr_area[idx + 1].index;
> + msr_area[idx].data = msr_area[idx + 1].data;
> + }
> + msr_area[msr_count - 1].index = 0;
> +
> + curr->arch.hvm_vmx.msr_count = --msr_count;
> + __vmwrite(VM_EXIT_MSR_STORE_COUNT, msr_count);
> + __vmwrite(VM_ENTRY_MSR_LOAD_COUNT, msr_count);
> +}
> +
> int vmx_add_host_load_msr(u32 msr)
> {
> struct vcpu *curr = current;
> @@ -1235,6 +1263,33 @@ int vmx_add_host_load_msr(u32 msr)
> return 0;
> }
>
> +void vmx_rm_host_load_msr(u32 msr)
> +{
> + struct vcpu *curr = current;
> + unsigned int idx, msr_count = curr->arch.hvm_vmx.host_msr_count;
> + struct vmx_msr_entry *msr_area =
> curr->arch.hvm_vmx.host_msr_area;
> +
> + if ( msr_area == NULL )
> + return;
> +
> + for ( idx = 0; idx < msr_count; idx++ )
> + if ( msr_area[idx].index == msr )
> + break;
> +
> + if ( idx == msr_count )
> + return;
> +
> + for ( ; idx < msr_count - 1; idx++ )
> + {
> + msr_area[idx].index = msr_area[idx + 1].index;
> + msr_area[idx].data = msr_area[idx + 1].data;
> + }
> + msr_area[msr_count - 1].index = 0;
> +
> + curr->arch.hvm_vmx.host_msr_count = --msr_count;
> + __vmwrite(VM_EXIT_MSR_LOAD_COUNT, msr_count);
> +}
> +
suggest to combine common code in above two 'rm' functions. You can pass in
a msr_area pointer/count , and only last several lines actually differ.
> void vmx_set_eoi_exit_bitmap(struct vcpu *v, u8 vector)
> {
> if ( !test_and_set_bit(vector, v->arch.hvm_vmx.eoi_exit_bitmap) )
> diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c
> b/xen/arch/x86/hvm/vmx/vpmu_core2.c
> index 1e32ff3..513eca4 100644
> --- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
> +++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
> @@ -69,6 +69,26 @@
> static bool_t __read_mostly full_width_write;
>
> /*
> + * MSR_CORE_PERF_FIXED_CTR_CTRL contains the configuration of all fixed
> + * counters. 4 bits for every counter.
> + */
> +#define FIXED_CTR_CTRL_BITS 4
> +#define FIXED_CTR_CTRL_MASK ((1 << FIXED_CTR_CTRL_BITS) - 1)
> +
> +#define VPMU_CORE2_MAX_FIXED_PMCS 4
> +struct core2_vpmu_context {
> + u64 fixed_ctrl;
> + u64 ds_area;
> + u64 pebs_enable;
just stay 'pebs' to be consistent.
> + u64 global_ovf_status;
> + u64 fix_counters[VPMU_CORE2_MAX_FIXED_PMCS];
> + struct arch_msr_pair arch_msr_pair[1];
> +};
> +
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 05/17] x86/VPMU: Handle APIC_LVTPC accesses
2014-04-23 12:50 ` [PATCH v5 RESEND 05/17] x86/VPMU: Handle APIC_LVTPC accesses Boris Ostrovsky
@ 2014-04-26 8:20 ` Tian, Kevin
2014-04-28 14:05 ` Boris Ostrovsky
0 siblings, 1 reply; 44+ messages in thread
From: Tian, Kevin @ 2014-04-26 8:20 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
> Sent: Wednesday, April 23, 2014 8:50 PM
>
> Update APIC_LVTPC vector when HVM guest writes to it.
>
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Acked-by: Kevin Tian <kevin.tian@intel.com>, with one comment.
> @@ -230,18 +238,18 @@ void vpmu_initialise(struct vcpu *v)
> case X86_VENDOR_AMD:
> if ( svm_vpmu_initialise(v, opt_vpmu_enabled) != 0 )
> opt_vpmu_enabled = 0;
> - break;
> + return;
>
> case X86_VENDOR_INTEL:
> if ( vmx_vpmu_initialise(v, opt_vpmu_enabled) != 0 )
> opt_vpmu_enabled = 0;
> - break;
> + return;
>
> default:
> printk("VPMU: Initialization failed. "
> "Unknown CPU vendor %d\n", vendor);
> opt_vpmu_enabled = 0;
> - break;
> + return;
> }
> }
>
not understand break->return change here
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 06/17] intel/VPMU: MSR_CORE_PERF_GLOBAL_CTRL should be initialized to zero
2014-04-23 12:50 ` [PATCH v5 RESEND 06/17] intel/VPMU: MSR_CORE_PERF_GLOBAL_CTRL should be initialized to zero Boris Ostrovsky
@ 2014-04-26 8:20 ` Tian, Kevin
0 siblings, 0 replies; 44+ messages in thread
From: Tian, Kevin @ 2014-04-26 8:20 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
> Sent: Wednesday, April 23, 2014 8:50 PM
>
> MSR_CORE_PERF_GLOBAL_CTRL register should be set zero initially. It is up to
> the guest to set it so that counters are enabled.
>
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Acked-by: Kevin Tian <kevin.tian@intel.com>
> ---
> xen/arch/x86/hvm/vmx/vpmu_core2.c | 10 +---------
> 1 file changed, 1 insertion(+), 9 deletions(-)
>
> diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c
> b/xen/arch/x86/hvm/vmx/vpmu_core2.c
> index c16ae10..c66289a 100644
> --- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
> +++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
> @@ -164,13 +164,6 @@ static int core2_get_fixed_pmc_count(void)
> return ( (eax & PMU_FIXED_NR_MASK) >> PMU_FIXED_NR_SHIFT );
> }
>
> -static u64 core2_calc_intial_glb_ctrl_msr(void)
> -{
> - int arch_pmc_bits = (1 << arch_pmc_cnt) - 1;
> - u64 fix_pmc_bits = (1 << fixed_pmc_cnt) - 1;
> - return ( (fix_pmc_bits << 32) | arch_pmc_bits );
> -}
> -
> /* edx bits 5-12: Bit width of fixed-function performance counters */
> static int core2_get_bitwidth_fix_count(void)
> {
> @@ -373,8 +366,7 @@ static int core2_vpmu_alloc_resource(struct vcpu *v)
>
> if ( vmx_add_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL) )
> goto out_err;
> - vmx_write_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL,
> - core2_calc_intial_glb_ctrl_msr());
> + vmx_write_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, 0);
>
> core2_vpmu_cxt = xzalloc_bytes(sizeof(struct core2_vpmu_context) +
> (arch_pmc_cnt-1)*sizeof(struct arch_msr_pair));
> --
> 1.8.3.1
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 07/17] x86/VPMU: Add public xenpmu.h
2014-04-23 12:50 ` [PATCH v5 RESEND 07/17] x86/VPMU: Add public xenpmu.h Boris Ostrovsky
@ 2014-04-26 8:21 ` Tian, Kevin
2014-04-28 9:03 ` Jan Beulich
0 siblings, 1 reply; 44+ messages in thread
From: Tian, Kevin @ 2014-04-26 8:21 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
> Sent: Wednesday, April 23, 2014 8:50 PM
>
> Add pmu.h header files, move various macros and structures that will be
> shared between hypervisor and PV guests to it.
>
> Move MSR banks out of architectural PMU structures to allow for larger sizes
> in the future. The banks are allocated immediately after the context and
> PMU structures store offsets to them.
>
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> ---
> xen/arch/x86/hvm/svm/vpmu.c | 71
> ++++++++++++++------------
> xen/arch/x86/hvm/vmx/vpmu_core2.c | 87
> +++++++++++++++++---------------
> xen/arch/x86/hvm/vpmu.c | 1 +
> xen/arch/x86/oprofile/op_model_ppro.c | 6 ++-
> xen/include/asm-x86/hvm/vmx/vpmu_core2.h | 32 ------------
> xen/include/asm-x86/hvm/vpmu.h | 13 ++---
> xen/include/public/arch-arm.h | 3 ++
> xen/include/public/arch-x86/pmu.h | 63
> +++++++++++++++++++++++
> xen/include/public/pmu.h | 38 ++++++++++++++
> 9 files changed, 199 insertions(+), 115 deletions(-)
> delete mode 100644 xen/include/asm-x86/hvm/vmx/vpmu_core2.h
> create mode 100644 xen/include/public/arch-x86/pmu.h
> create mode 100644 xen/include/public/pmu.h
>
> diff --git a/xen/include/public/arch-x86/pmu.h
> b/xen/include/public/arch-x86/pmu.h
> new file mode 100644
> index 0000000..fc022e2
> --- /dev/null
> +++ b/xen/include/public/arch-x86/pmu.h
> @@ -0,0 +1,63 @@
> +#ifndef __XEN_PUBLIC_ARCH_X86_PMU_H__
> +#define __XEN_PUBLIC_ARCH_X86_PMU_H__
> +
> +/* x86-specific PMU definitions */
> +
> +/* AMD PMU registers and structures */
> +struct xen_pmu_amd_ctxt {
> + uint32_t counters; /* Offset to counter MSRs */
> + uint32_t ctrls; /* Offset to control MSRs */
> + uint32_t msr_bitmap_set; /* Used by HVM only */
> +};
> +
> +/* Intel PMU registers and structures */
> +struct xen_pmu_cntr_pair {
> + uint64_t counter;
> + uint64_t control;
> +};
> +
> +struct xen_pmu_intel_ctxt {
> + uint64_t global_ctrl;
> + uint64_t global_ovf_ctrl;
> + uint64_t global_status;
> + uint64_t fixed_ctrl;
> + uint64_t ds_area;
> + uint64_t pebs_enable;
> + uint64_t debugctl;
> + uint32_t fixed_counters; /* Offset to fixed counter MSRs */
> + uint32_t arch_counters; /* Offset to architectural counter MSRs */
> +};
> +
> +#define XENPMU_MAX_CTXT_SZ (sizeof(struct xen_pmu_amd_ctxt) >
> \
> + sizeof(struct
> xen_pmu_intel_ctxt) ? \
> + sizeof(struct
> xen_pmu_amd_ctxt) : \
> + sizeof(struct
> xen_pmu_intel_ctxt))
> +#define XENPMU_CTXT_PAD_SZ (((XENPMU_MAX_CTXT_SZ + 64) &
> ~63) + 128)
> +struct xen_arch_pmu {
> + union {
> + struct cpu_user_regs regs;
> + uint8_t pad1[256];
> + } r;
> + union {
> + uint32_t lapic_lvtpc;
> + uint64_t pad2;
> + } l;
> + union {
> + struct xen_pmu_amd_ctxt amd;
> + struct xen_pmu_intel_ctxt intel;
> + uint8_t pad3[XENPMU_CTXT_PAD_SZ];
> + } c;
> +};
'xen_' prefix is meaningless here, and suppose to sustain vpmu in the names.
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 08/17] x86/VPMU: Make vpmu not HVM-specific
2014-04-23 12:50 ` [PATCH v5 RESEND 08/17] x86/VPMU: Make vpmu not HVM-specific Boris Ostrovsky
@ 2014-04-26 8:21 ` Tian, Kevin
0 siblings, 0 replies; 44+ messages in thread
From: Tian, Kevin @ 2014-04-26 8:21 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
> Sent: Wednesday, April 23, 2014 8:50 PM
>
> vpmu structure will be used for both HVM and PV guests. Move it from
> hvm_vcpu to arch_vcpu.
>
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> ---
> xen/include/asm-x86/domain.h | 2 ++
> xen/include/asm-x86/hvm/vcpu.h | 3 ---
> xen/include/asm-x86/hvm/vpmu.h | 5 ++---
> 3 files changed, 4 insertions(+), 6 deletions(-)
Acked-by: Kevin Tian <kevin.tian@intel.com>
>
> diff --git a/xen/include/asm-x86/domain.h b/xen/include/asm-x86/domain.h
> index ea72db2..f38298c 100644
> --- a/xen/include/asm-x86/domain.h
> +++ b/xen/include/asm-x86/domain.h
> @@ -400,6 +400,8 @@ struct arch_vcpu
> void (*ctxt_switch_from) (struct vcpu *);
> void (*ctxt_switch_to) (struct vcpu *);
>
> + struct vpmu_struct vpmu;
> +
> /* Virtual Machine Extensions */
> union {
> struct pv_vcpu pv_vcpu;
> diff --git a/xen/include/asm-x86/hvm/vcpu.h
> b/xen/include/asm-x86/hvm/vcpu.h
> index 122ab0d..9beeaa9 100644
> --- a/xen/include/asm-x86/hvm/vcpu.h
> +++ b/xen/include/asm-x86/hvm/vcpu.h
> @@ -152,9 +152,6 @@ struct hvm_vcpu {
> u32 msr_tsc_aux;
> u64 msr_tsc_adjust;
>
> - /* VPMU */
> - struct vpmu_struct vpmu;
> -
> union {
> struct arch_vmx_struct vmx;
> struct arch_svm_struct svm;
> diff --git a/xen/include/asm-x86/hvm/vpmu.h
> b/xen/include/asm-x86/hvm/vpmu.h
> index 87a72ce..edc67f6 100644
> --- a/xen/include/asm-x86/hvm/vpmu.h
> +++ b/xen/include/asm-x86/hvm/vpmu.h
> @@ -31,9 +31,8 @@
> #define VPMU_BOOT_ENABLED 0x1 /* vpmu generally enabled. */
> #define VPMU_BOOT_BTS 0x2 /* Intel BTS feature wanted. */
>
> -#define vcpu_vpmu(vcpu) (&((vcpu)->arch.hvm_vcpu.vpmu))
> -#define vpmu_vcpu(vpmu) (container_of((vpmu), struct vcpu, \
> - arch.hvm_vcpu.vpmu))
> +#define vcpu_vpmu(vcpu) (&(vcpu)->arch.vpmu)
> +#define vpmu_vcpu(vpmu) container_of(vpmu, struct vcpu, arch.vpmu)
>
> #define MSR_TYPE_COUNTER 0
> #define MSR_TYPE_CTRL 1
> --
> 1.8.3.1
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 09/17] x86/VPMU: Interface for setting PMU mode and flags
2014-04-23 12:50 ` [PATCH v5 RESEND 09/17] x86/VPMU: Interface for setting PMU mode and flags Boris Ostrovsky
@ 2014-04-26 8:21 ` Tian, Kevin
0 siblings, 0 replies; 44+ messages in thread
From: Tian, Kevin @ 2014-04-26 8:21 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
> Sent: Wednesday, April 23, 2014 8:51 PM
>
> Add runtime interface for setting PMU mode and flags. Three main modes are
> provided:
> * PMU off
> * PMU on: Guests can access PMU MSRs and receive PMU interrupts. dom0
> profiles itself and the hypervisor.
> * dom0-only PMU: dom0 collects samples for both itself and guests.
>
> For feature flags only Intel's BTS is currently supported.
>
> Mode and flags are set via HYPERVISOR_xenpmu_op hypercall.
>
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Similarly, why do you want so many "XEN" and "xen_" prefixes? :-)
> ---
> xen/arch/x86/domain.c | 4 +-
> xen/arch/x86/hvm/svm/vpmu.c | 4 +-
> xen/arch/x86/hvm/vmx/vpmu_core2.c | 10 +--
> xen/arch/x86/hvm/vpmu.c | 121
> ++++++++++++++++++++++++++++++++++---
> xen/arch/x86/x86_64/compat/entry.S | 4 ++
> xen/arch/x86/x86_64/entry.S | 4 ++
> xen/include/asm-x86/hvm/vpmu.h | 14 ++---
> xen/include/public/pmu.h | 48 +++++++++++++++
> xen/include/public/xen.h | 1 +
> xen/include/xen/hypercall.h | 4 ++
> 10 files changed, 188 insertions(+), 26 deletions(-)
>
> diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c
> index 6618ae6..b615c07 100644
> --- a/xen/arch/x86/domain.c
> +++ b/xen/arch/x86/domain.c
> @@ -1465,7 +1465,7 @@ void context_switch(struct vcpu *prev, struct vcpu
> *next)
>
> if ( is_hvm_vcpu(prev) )
> {
> - if (prev != next)
> + if ( (prev != next) && (vpmu_mode & XENPMU_MODE_ON) )
> vpmu_save(prev);
>
> if ( !list_empty(&prev->arch.hvm_vcpu.tm_list) )
> @@ -1508,7 +1508,7 @@ void context_switch(struct vcpu *prev, struct vcpu
> *next)
> (next->domain->domain_id != 0));
> }
>
> - if (is_hvm_vcpu(next) && (prev != next) )
> + if ( is_hvm_vcpu(next) && (prev != next) && (vpmu_mode &
> XENPMU_MODE_ON) )
> /* Must be done with interrupts enabled */
> vpmu_load(next);
>
> diff --git a/xen/arch/x86/hvm/svm/vpmu.c b/xen/arch/x86/hvm/svm/vpmu.c
> index d199f08..97cd6e5 100644
> --- a/xen/arch/x86/hvm/svm/vpmu.c
> +++ b/xen/arch/x86/hvm/svm/vpmu.c
> @@ -472,14 +472,14 @@ struct arch_vpmu_ops amd_vpmu_ops = {
> .arch_vpmu_dump = amd_vpmu_dump
> };
>
> -int svm_vpmu_initialise(struct vcpu *v, unsigned int vpmu_flags)
> +int svm_vpmu_initialise(struct vcpu *v)
> {
> struct vpmu_struct *vpmu = vcpu_vpmu(v);
> uint8_t family = current_cpu_data.x86;
> int ret = 0;
>
> /* vpmu enabled? */
> - if ( !vpmu_flags )
> + if ( vpmu_mode == XENPMU_MODE_OFF )
> return 0;
>
> switch ( family )
> diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c
> b/xen/arch/x86/hvm/vmx/vpmu_core2.c
> index 856281d..efbebe2 100644
> --- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
> +++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
> @@ -703,13 +703,13 @@ static int core2_vpmu_do_interrupt(struct
> cpu_user_regs *regs)
> return 1;
> }
>
> -static int core2_vpmu_initialise(struct vcpu *v, unsigned int vpmu_flags)
> +static int core2_vpmu_initialise(struct vcpu *v)
> {
> struct vpmu_struct *vpmu = vcpu_vpmu(v);
> u64 msr_content;
> struct cpuinfo_x86 *c = ¤t_cpu_data;
>
> - if ( !(vpmu_flags & VPMU_BOOT_BTS) )
> + if ( !(vpmu_features & XENPMU_FEATURE_INTEL_BTS) )
> goto func_out;
> /* Check the 'Debug Store' feature in the CPUID.EAX[1]:EDX[21] */
> if ( cpu_has(c, X86_FEATURE_DS) )
> @@ -820,7 +820,7 @@ struct arch_vpmu_ops core2_no_vpmu_ops = {
> .do_cpuid = core2_no_vpmu_do_cpuid,
> };
>
> -int vmx_vpmu_initialise(struct vcpu *v, unsigned int vpmu_flags)
> +int vmx_vpmu_initialise(struct vcpu *v)
> {
> struct vpmu_struct *vpmu = vcpu_vpmu(v);
> uint8_t family = current_cpu_data.x86;
> @@ -828,7 +828,7 @@ int vmx_vpmu_initialise(struct vcpu *v, unsigned int
> vpmu_flags)
> int ret = 0;
>
> vpmu->arch_vpmu_ops = &core2_no_vpmu_ops;
> - if ( !vpmu_flags )
> + if ( vpmu_mode == XENPMU_MODE_OFF )
> return 0;
>
> if ( family == 6 )
> @@ -867,7 +867,7 @@ int vmx_vpmu_initialise(struct vcpu *v, unsigned int
> vpmu_flags)
> case 0x3f:
> case 0x45:
> case 0x46:
> - ret = core2_vpmu_initialise(v, vpmu_flags);
> + ret = core2_vpmu_initialise(v);
> if ( !ret )
> vpmu->arch_vpmu_ops = &core2_vpmu_ops;
> return ret;
> diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
> index a6e933a..50f6bb8 100644
> --- a/xen/arch/x86/hvm/vpmu.c
> +++ b/xen/arch/x86/hvm/vpmu.c
> @@ -21,6 +21,7 @@
> #include <xen/config.h>
> #include <xen/sched.h>
> #include <xen/xenoprof.h>
> +#include <xen/guest_access.h>
> #include <asm/regs.h>
> #include <asm/types.h>
> #include <asm/msr.h>
> @@ -38,7 +39,8 @@
> * "vpmu=off" : vpmu generally disabled
> * "vpmu=bts" : vpmu enabled and Intel BTS feature switched on.
> */
> -static unsigned int __read_mostly opt_vpmu_enabled;
> +uint64_t __read_mostly vpmu_mode = XENPMU_MODE_OFF;
> +uint64_t __read_mostly vpmu_features = 0;
> static void parse_vpmu_param(char *s);
> custom_param("vpmu", parse_vpmu_param);
>
> @@ -52,7 +54,7 @@ static void __init parse_vpmu_param(char *s)
> break;
> default:
> if ( !strcmp(s, "bts") )
> - opt_vpmu_enabled |= VPMU_BOOT_BTS;
> + vpmu_features |= XENPMU_FEATURE_INTEL_BTS;
> else if ( *s )
> {
> printk("VPMU: unknown flag: %s - vpmu disabled!\n", s);
> @@ -60,7 +62,7 @@ static void __init parse_vpmu_param(char *s)
> }
> /* fall through */
> case 1:
> - opt_vpmu_enabled |= VPMU_BOOT_ENABLED;
> + vpmu_mode = XENPMU_MODE_ON;
> break;
> }
> }
> @@ -77,6 +79,9 @@ int vpmu_do_wrmsr(unsigned int msr, uint64_t
> msr_content)
> {
> struct vpmu_struct *vpmu = vcpu_vpmu(current);
>
> + if ( !(vpmu_mode & XENPMU_MODE_ON) )
> + return 0;
> +
> if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->do_wrmsr )
> return vpmu->arch_vpmu_ops->do_wrmsr(msr, msr_content);
> return 0;
> @@ -86,6 +91,9 @@ int vpmu_do_rdmsr(unsigned int msr, uint64_t
> *msr_content)
> {
> struct vpmu_struct *vpmu = vcpu_vpmu(current);
>
> + if ( !(vpmu_mode & XENPMU_MODE_ON) )
> + return 0;
> +
> if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->do_rdmsr )
> return vpmu->arch_vpmu_ops->do_rdmsr(msr, msr_content);
> return 0;
> @@ -237,19 +245,19 @@ void vpmu_initialise(struct vcpu *v)
> switch ( vendor )
> {
> case X86_VENDOR_AMD:
> - if ( svm_vpmu_initialise(v, opt_vpmu_enabled) != 0 )
> - opt_vpmu_enabled = 0;
> + if ( svm_vpmu_initialise(v) != 0 )
> + vpmu_mode = XENPMU_MODE_OFF;
> return;
>
> case X86_VENDOR_INTEL:
> - if ( vmx_vpmu_initialise(v, opt_vpmu_enabled) != 0 )
> - opt_vpmu_enabled = 0;
> + if ( vmx_vpmu_initialise(v) != 0 )
> + vpmu_mode = XENPMU_MODE_OFF;
> return;
>
> default:
> printk("VPMU: Initialization failed. "
> "Unknown CPU vendor %d\n", vendor);
> - opt_vpmu_enabled = 0;
> + vpmu_mode = XENPMU_MODE_OFF;
> return;
> }
> }
> @@ -271,3 +279,100 @@ void vpmu_dump(struct vcpu *v)
> vpmu->arch_vpmu_ops->arch_vpmu_dump(v);
> }
>
> +/* Unload VPMU contexts */
> +static void vpmu_unload_all(void)
> +{
> + struct domain *d;
> + struct vcpu *v;
> + struct vpmu_struct *vpmu;
> +
> + for_each_domain(d)
> + {
> + for_each_vcpu ( d, v )
> + {
> + if ( v != current )
> + vcpu_pause(v);
> + vpmu = vcpu_vpmu(v);
> +
> + if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
> + {
> + if ( v != current )
> + vcpu_unpause(v);
> + continue;
> + }
> +
> + vpmu_set(vpmu, VPMU_CONTEXT_SAVE);
> + on_selected_cpus(cpumask_of(vpmu->last_pcpu),
> + vpmu_save_force, (void *)v, 1);
> + vpmu_reset(vpmu, VPMU_CONTEXT_LOADED);
> +
> + if ( v != current )
> + vcpu_unpause(v);
> + }
> + }
> +}
> +
> +
> +long do_xenpmu_op(int op,
> XEN_GUEST_HANDLE_PARAM(xen_pmu_params_t) arg)
> +{
> + int ret = -EINVAL;
> + xen_pmu_params_t pmu_params;
> +
> + switch ( op )
> + {
> + case XENPMU_mode_set:
> + if ( !is_control_domain(current->domain) )
> + return -EPERM;
> +
> + if ( copy_from_guest(&pmu_params, arg, 1) )
> + return -EFAULT;
> +
> + if ( pmu_params.d.val & ~XENPMU_MODE_ON )
> + return -EINVAL;
> +
> + vpmu_mode = pmu_params.d.val;
> + if ( vpmu_mode == XENPMU_MODE_OFF )
> + /*
> + * After this VPMU context will never be loaded during
> context
> + * switch. We also prevent PMU MSR accesses (which can
> load
> + * context) when VPMU is disabled.
> + */
> + vpmu_unload_all();
> +
> + ret = 0;
> + break;
> +
> + case XENPMU_mode_get:
> + pmu_params.d.val = vpmu_mode;
> + pmu_params.v.version.maj = XENPMU_VER_MAJ;
> + pmu_params.v.version.min = XENPMU_VER_MIN;
> + if ( copy_to_guest(arg, &pmu_params, 1) )
> + return -EFAULT;
> + ret = 0;
> + break;
> +
> + case XENPMU_feature_set:
> + if ( !is_control_domain(current->domain) )
> + return -EPERM;
> +
> + if ( copy_from_guest(&pmu_params, arg, 1) )
> + return -EFAULT;
> +
> + if ( pmu_params.d.val & ~XENPMU_FEATURE_INTEL_BTS )
> + return -EINVAL;
> +
> + vpmu_features = pmu_params.d.val;
> +
> + ret = 0;
> + break;
> +
> + case XENPMU_feature_get:
> + pmu_params.d.val = vpmu_mode;
> + if ( copy_to_guest(arg, &pmu_params, 1) )
> + return -EFAULT;
> + ret = 0;
> + break;
> + }
> +
> + return ret;
> +}
> diff --git a/xen/arch/x86/x86_64/compat/entry.S
> b/xen/arch/x86/x86_64/compat/entry.S
> index 594b0b9..07c736d 100644
> --- a/xen/arch/x86/x86_64/compat/entry.S
> +++ b/xen/arch/x86/x86_64/compat/entry.S
> @@ -416,6 +416,8 @@ ENTRY(compat_hypercall_table)
> .quad do_domctl
> .quad compat_kexec_op
> .quad do_tmem_op
> + .quad do_ni_hypercall /* reserved for XenClient */
> + .quad do_xenpmu_op /* 40 */
> .rept __HYPERVISOR_arch_0-((.-compat_hypercall_table)/8)
> .quad compat_ni_hypercall
> .endr
> @@ -464,6 +466,8 @@ ENTRY(compat_hypercall_args_table)
> .byte 1 /* do_domctl */
> .byte 2 /* compat_kexec_op */
> .byte 1 /* do_tmem_op */
> + .byte 0 /* reserved for XenClient */
> + .byte 2 /* do_xenpmu_op */ /* 40 */
> .rept __HYPERVISOR_arch_0-(.-compat_hypercall_args_table)
> .byte 0 /* compat_ni_hypercall */
> .endr
> diff --git a/xen/arch/x86/x86_64/entry.S b/xen/arch/x86/x86_64/entry.S
> index 3ea4683..c36ffce 100644
> --- a/xen/arch/x86/x86_64/entry.S
> +++ b/xen/arch/x86/x86_64/entry.S
> @@ -757,6 +757,8 @@ ENTRY(hypercall_table)
> .quad do_domctl
> .quad do_kexec_op
> .quad do_tmem_op
> + .quad do_ni_hypercall /* reserved for XenClient */
> + .quad do_xenpmu_op /* 40 */
> .rept __HYPERVISOR_arch_0-((.-hypercall_table)/8)
> .quad do_ni_hypercall
> .endr
> @@ -805,6 +807,8 @@ ENTRY(hypercall_args_table)
> .byte 1 /* do_domctl */
> .byte 2 /* do_kexec */
> .byte 1 /* do_tmem_op */
> + .byte 0 /* reserved for XenClient */
> + .byte 2 /* do_xenpmu_op */ /* 40 */
> .rept __HYPERVISOR_arch_0-(.-hypercall_args_table)
> .byte 0 /* do_ni_hypercall */
> .endr
> diff --git a/xen/include/asm-x86/hvm/vpmu.h
> b/xen/include/asm-x86/hvm/vpmu.h
> index edc67f6..b945e8f 100644
> --- a/xen/include/asm-x86/hvm/vpmu.h
> +++ b/xen/include/asm-x86/hvm/vpmu.h
> @@ -24,13 +24,6 @@
>
> #include <public/pmu.h>
>
> -/*
> - * Flag bits given as a string on the hypervisor boot parameter 'vpmu'.
> - * See arch/x86/hvm/vpmu.c.
> - */
> -#define VPMU_BOOT_ENABLED 0x1 /* vpmu generally enabled. */
> -#define VPMU_BOOT_BTS 0x2 /* Intel BTS feature wanted. */
> -
> #define vcpu_vpmu(vcpu) (&(vcpu)->arch.vpmu)
> #define vpmu_vcpu(vpmu) container_of(vpmu, struct vcpu, arch.vpmu)
>
> @@ -58,8 +51,8 @@ struct arch_vpmu_ops {
> void (*arch_vpmu_dump)(const struct vcpu *);
> };
>
> -int vmx_vpmu_initialise(struct vcpu *, unsigned int flags);
> -int svm_vpmu_initialise(struct vcpu *, unsigned int flags);
> +int vmx_vpmu_initialise(struct vcpu *);
> +int svm_vpmu_initialise(struct vcpu *);
>
> struct vpmu_struct {
> u32 flags;
> @@ -98,5 +91,8 @@ void vpmu_dump(struct vcpu *v);
> extern int acquire_pmu_ownership(int pmu_ownership);
> extern void release_pmu_ownership(int pmu_ownership);
>
> +extern uint64_t vpmu_mode;
> +extern uint64_t vpmu_features;
> +
> #endif /* __ASM_X86_HVM_VPMU_H_*/
>
> diff --git a/xen/include/public/pmu.h b/xen/include/public/pmu.h
> index 3ffd2cf..f91d935 100644
> --- a/xen/include/public/pmu.h
> +++ b/xen/include/public/pmu.h
> @@ -13,6 +13,54 @@
> #define XENPMU_VER_MAJ 0
> #define XENPMU_VER_MIN 0
>
> +/*
> + * ` enum neg_errnoval
> + * ` HYPERVISOR_xenpmu_op(enum xenpmu_op cmd, struct xenpmu_params
> *args);
> + *
> + * @cmd == XENPMU_* (PMU operation)
> + * @args == struct xenpmu_params
> + */
> +/* ` enum xenpmu_op { */
> +#define XENPMU_mode_get 0 /* Also used for getting PMU version
> */
> +#define XENPMU_mode_set 1
> +#define XENPMU_feature_get 2
> +#define XENPMU_feature_set 3
> +/* ` } */
> +
> +/* Parameters structure for HYPERVISOR_xenpmu_op call */
> +struct xen_pmu_params {
> + /* IN/OUT parameters */
> + union {
> + struct version {
> + uint8_t maj;
> + uint8_t min;
> + } version;
> + uint64_t pad;
> + } v;
> + union {
> + uint64_t val;
> + XEN_GUEST_HANDLE(void) valp;
> + } d;
> +
> + /* IN parameters */
> + uint64_t vcpu;
> +};
> +typedef struct xen_pmu_params xen_pmu_params_t;
> +DEFINE_XEN_GUEST_HANDLE(xen_pmu_params_t);
> +
> +/* PMU modes:
> + * - XENPMU_MODE_OFF: No PMU virtualization
> + * - XENPMU_MODE_ON: Guests can profile themselves, dom0 profiles
> + * itself and Xen
> + */
> +#define XENPMU_MODE_OFF 0
> +#define XENPMU_MODE_ON (1<<0)
> +
> +/*
> + * PMU features:
> + * - XENPMU_FEATURE_INTEL_BTS: Intel BTS support (ignored on AMD)
> + */
> +#define XENPMU_FEATURE_INTEL_BTS 1
>
> /* Shared between hypervisor and PV domain */
> struct xen_pmu_data {
> diff --git a/xen/include/public/xen.h b/xen/include/public/xen.h
> index 8c5697e..a00ab21 100644
> --- a/xen/include/public/xen.h
> +++ b/xen/include/public/xen.h
> @@ -101,6 +101,7 @@ DEFINE_XEN_GUEST_HANDLE(xen_ulong_t);
> #define __HYPERVISOR_kexec_op 37
> #define __HYPERVISOR_tmem_op 38
> #define __HYPERVISOR_xc_reserved_op 39 /* reserved for XenClient
> */
> +#define __HYPERVISOR_xenpmu_op 40
>
> /* Architecture-specific hypercall definitions. */
> #define __HYPERVISOR_arch_0 48
> diff --git a/xen/include/xen/hypercall.h b/xen/include/xen/hypercall.h
> index a9e5229..cf34547 100644
> --- a/xen/include/xen/hypercall.h
> +++ b/xen/include/xen/hypercall.h
> @@ -14,6 +14,7 @@
> #include <public/event_channel.h>
> #include <public/tmem.h>
> #include <public/version.h>
> +#include <public/pmu.h>
> #include <asm/hypercall.h>
> #include <xsm/xsm.h>
>
> @@ -139,6 +140,9 @@ do_tmem_op(
> extern long
> do_xenoprof_op(int op, XEN_GUEST_HANDLE_PARAM(void) arg);
>
> +extern long
> +do_xenpmu_op(int op, XEN_GUEST_HANDLE_PARAM(xen_pmu_params_t)
> arg);
> +
> #ifdef CONFIG_COMPAT
>
> extern int
> --
> 1.8.3.1
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 10/17] x86/VPMU: Initialize PMU for PV guests
2014-04-23 12:50 ` [PATCH v5 RESEND 10/17] x86/VPMU: Initialize PMU for PV guests Boris Ostrovsky
@ 2014-04-26 8:21 ` Tian, Kevin
0 siblings, 0 replies; 44+ messages in thread
From: Tian, Kevin @ 2014-04-26 8:21 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
> Sent: Wednesday, April 23, 2014 8:51 PM
>
> Code for initializing/tearing down PMU for PV guests
>
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Acked-by: Kevin Tian <kevin.tian@intel.com>
> ---
> xen/arch/x86/hvm/svm/svm.c | 6 ++-
> xen/arch/x86/hvm/svm/vpmu.c | 40 +++++++++---------
> xen/arch/x86/hvm/vmx/vmx.c | 6 ++-
> xen/arch/x86/hvm/vmx/vpmu_core2.c | 51 +++++++++++++++--------
> xen/arch/x86/hvm/vpmu.c | 85
> ++++++++++++++++++++++++++++++++++++++-
> xen/common/event_channel.c | 1 +
> xen/include/asm-x86/hvm/vpmu.h | 1 +
> xen/include/public/pmu.h | 2 +
> xen/include/public/xen.h | 1 +
> xen/include/xen/softirq.h | 1 +
> 10 files changed, 154 insertions(+), 40 deletions(-)
>
> diff --git a/xen/arch/x86/hvm/svm/svm.c b/xen/arch/x86/hvm/svm/svm.c
> index 406d394..9ee0c1f 100644
> --- a/xen/arch/x86/hvm/svm/svm.c
> +++ b/xen/arch/x86/hvm/svm/svm.c
> @@ -1045,7 +1045,8 @@ static int svm_vcpu_initialise(struct vcpu *v)
> return rc;
> }
>
> - vpmu_initialise(v);
> + if ( is_hvm_domain(v->domain) )
> + vpmu_initialise(v);
>
> svm_guest_osvw_init(v);
>
> @@ -1054,7 +1055,8 @@ static int svm_vcpu_initialise(struct vcpu *v)
>
> static void svm_vcpu_destroy(struct vcpu *v)
> {
> - vpmu_destroy(v);
> + if ( is_hvm_domain(v->domain) )
> + vpmu_destroy(v);
> svm_destroy_vmcb(v);
> passive_domain_destroy(v);
> }
> diff --git a/xen/arch/x86/hvm/svm/vpmu.c b/xen/arch/x86/hvm/svm/vpmu.c
> index 97cd6e5..346aa51 100644
> --- a/xen/arch/x86/hvm/svm/vpmu.c
> +++ b/xen/arch/x86/hvm/svm/vpmu.c
> @@ -381,16 +381,21 @@ static int amd_vpmu_initialise(struct vcpu *v)
> }
> }
>
> - ctxt = xzalloc_bytes(sizeof(struct xen_pmu_amd_ctxt) +
> - sizeof(uint64_t) * AMD_MAX_COUNTERS +
> - sizeof(uint64_t) * AMD_MAX_COUNTERS);
> - if ( !ctxt )
> + if ( !is_pv_domain(v->domain) )
> {
> - gdprintk(XENLOG_WARNING, "Insufficient memory for PMU, "
> - " PMU feature is unavailable on domain %d vcpu %d.\n",
> - v->vcpu_id, v->domain->domain_id);
> - return -ENOMEM;
> + ctxt = xzalloc_bytes(sizeof(struct xen_pmu_amd_ctxt) +
> + sizeof(uint64_t) * AMD_MAX_COUNTERS
> +
> + sizeof(uint64_t) *
> AMD_MAX_COUNTERS);
> + if ( !ctxt )
> + {
> + gdprintk(XENLOG_WARNING, "Insufficient memory for PMU, "
> + " PMU feature is unavailable on domain %d
> vcpu %d.\n",
> + v->vcpu_id, v->domain->domain_id);
> + return -ENOMEM;
> + }
> }
> + else
> + ctxt = &v->arch.vpmu.xenpmu_data->pmu.c.amd;
>
> ctxt->counters = sizeof(struct xen_pmu_amd_ctxt);
> ctxt->ctrls = ctxt->counters + sizeof(uint64_t) * AMD_MAX_COUNTERS;
> @@ -407,18 +412,17 @@ static void amd_vpmu_destroy(struct vcpu *v)
> if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
> return;
>
> - if ( is_hvm_domain(v->domain) &&
> - ((struct xen_pmu_amd_ctxt *)vpmu->context)->msr_bitmap_set )
> - amd_vpmu_unset_msr_bitmap(v);
> -
> - xfree(vpmu->context);
> - vpmu_reset(vpmu, VPMU_CONTEXT_ALLOCATED);
> -
> - if ( vpmu_is_set(vpmu, VPMU_RUNNING) )
> + if ( is_hvm_domain(v->domain) )
> {
> - vpmu_reset(vpmu, VPMU_RUNNING);
> - release_pmu_ownship(PMU_OWNER_HVM);
> + if ( ((struct xen_pmu_amd_ctxt
> *)vpmu->context)->msr_bitmap_set )
> + amd_vpmu_unset_msr_bitmap(v);
> +
> + xfree(vpmu->context);
> }
> +
> + vpmu->context = NULL;
> + vpmu_clear(vpmu);
> + release_pmu_ownship(PMU_OWNER_HVM);
> }
>
> /* VPMU part of the 'q' keyhandler */
> diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
> index f6409d6..76c1bc8 100644
> --- a/xen/arch/x86/hvm/vmx/vmx.c
> +++ b/xen/arch/x86/hvm/vmx/vmx.c
> @@ -112,7 +112,8 @@ static int vmx_vcpu_initialise(struct vcpu *v)
> return rc;
> }
>
> - vpmu_initialise(v);
> + if ( is_hvm_domain(v->domain) )
> + vpmu_initialise(v);
>
> vmx_install_vlapic_mapping(v);
>
> @@ -126,7 +127,8 @@ static int vmx_vcpu_initialise(struct vcpu *v)
> static void vmx_vcpu_destroy(struct vcpu *v)
> {
> vmx_destroy_vmcs(v);
> - vpmu_destroy(v);
> + if ( is_hvm_domain(v->domain) )
> + vpmu_destroy(v);
> passive_domain_destroy(v);
> }
>
> diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c
> b/xen/arch/x86/hvm/vmx/vpmu_core2.c
> index efbebe2..de1e09d 100644
> --- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
> +++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
> @@ -358,22 +358,30 @@ static int core2_vpmu_alloc_resource(struct vcpu
> *v)
> struct vpmu_struct *vpmu = vcpu_vpmu(v);
> struct xen_pmu_intel_ctxt *core2_vpmu_cxt;
>
> - if ( !acquire_pmu_ownership(PMU_OWNER_HVM) )
> - return 0;
> + if ( !is_pv_domain(v->domain) )
> + {
> + if ( !acquire_pmu_ownership(PMU_OWNER_HVM) )
> + return 0;
>
> - wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0);
> - if ( vmx_add_host_load_msr(MSR_CORE_PERF_GLOBAL_CTRL) )
> - goto out_err;
> + wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0);
> + if ( vmx_add_host_load_msr(MSR_CORE_PERF_GLOBAL_CTRL) )
> + goto out_err;
>
> - if ( vmx_add_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL) )
> - goto out_err;
> - vmx_write_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, 0);
> + if ( vmx_add_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL) )
> + goto out_err;
> + vmx_write_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL, 0);
>
> - core2_vpmu_cxt = xzalloc_bytes(sizeof(struct xen_pmu_intel_ctxt) +
> - sizeof(uint64_t) * fixed_pmc_cnt +
> - sizeof(struct xen_pmu_cntr_pair) * arch_pmc_cnt);
> - if ( !core2_vpmu_cxt )
> - goto out_err;
> + core2_vpmu_cxt = xzalloc_bytes(sizeof(struct xen_pmu_intel_ctxt)
> +
> + sizeof(uint64_t) *
> fixed_pmc_cnt +
> + sizeof(struct
> xen_pmu_cntr_pair) * arch_pmc_cnt);
> + if ( !core2_vpmu_cxt )
> + goto out_err;
> + }
> + else
> + {
> + core2_vpmu_cxt = &v->arch.vpmu.xenpmu_data->pmu.c.intel;
> + vpmu_set(vpmu, VPMU_CONTEXT_ALLOCATED);
> + }
>
> core2_vpmu_cxt->fixed_counters = sizeof(struct xen_pmu_intel_ctxt);
> core2_vpmu_cxt->arch_counters = core2_vpmu_cxt->fixed_counters +
> @@ -753,6 +761,10 @@ func_out:
> fixed_pmc_cnt = core2_get_fixed_pmc_count();
> check_pmc_quirk();
>
> + /* PV domains can allocate resources immediately */
> + if ( is_pv_domain(v->domain) && !core2_vpmu_alloc_resource(v) )
> + return 1;
> +
> return 0;
> }
>
> @@ -763,11 +775,16 @@ static void core2_vpmu_destroy(struct vcpu *v)
> if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
> return;
>
> - xfree(vpmu->context);
> - if ( cpu_has_vmx_msr_bitmap && is_hvm_domain(v->domain) )
> - core2_vpmu_unset_msr_bitmap(v->arch.hvm_vmx.msr_bitmap);
> + if ( is_hvm_domain(v->domain) )
> + {
> + xfree(vpmu->context);
> + if ( cpu_has_vmx_msr_bitmap )
> +
> core2_vpmu_unset_msr_bitmap(v->arch.hvm_vmx.msr_bitmap);
> + }
> +
> release_pmu_ownship(PMU_OWNER_HVM);
> - vpmu_reset(vpmu, VPMU_CONTEXT_ALLOCATED);
> + vpmu->context = NULL;
> + vpmu_clear(vpmu);
> }
>
> struct arch_vpmu_ops core2_vpmu_ops = {
> diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
> index 50f6bb8..68897f6 100644
> --- a/xen/arch/x86/hvm/vpmu.c
> +++ b/xen/arch/x86/hvm/vpmu.c
> @@ -21,10 +21,14 @@
> #include <xen/config.h>
> #include <xen/sched.h>
> #include <xen/xenoprof.h>
> +#include <xen/event.h>
> +#include <xen/softirq.h>
> +#include <xen/hypercall.h>
> #include <xen/guest_access.h>
> #include <asm/regs.h>
> #include <asm/types.h>
> #include <asm/msr.h>
> +#include <asm/p2m.h>
> #include <asm/hvm/support.h>
> #include <asm/hvm/vmx/vmx.h>
> #include <asm/hvm/vmx/vmcs.h>
> @@ -267,7 +271,13 @@ void vpmu_destroy(struct vcpu *v)
> struct vpmu_struct *vpmu = vcpu_vpmu(v);
>
> if ( vpmu->arch_vpmu_ops &&
> vpmu->arch_vpmu_ops->arch_vpmu_destroy )
> + {
> + /* Unload VPMU first. This will stop counters */
> + on_selected_cpus(cpumask_of(vcpu_vpmu(v)->last_pcpu),
> + vpmu_save_force, (void *)v, 1);
> +
> vpmu->arch_vpmu_ops->arch_vpmu_destroy(v);
> + }
> }
>
> /* Dump some vpmu informations on console. Used in keyhandler
> dump_domains(). */
> @@ -312,6 +322,67 @@ static void vpmu_unload_all(void)
> }
> }
>
> +static int pvpmu_init(struct domain *d, xen_pmu_params_t *params)
> +{
> + struct vcpu *v;
> + struct page_info *page;
> + uint64_t gfn = params->d.val;
> +
> + if ( !is_pv_domain(d) )
> + return -EINVAL;
> +
> + if ( params->vcpu < 0 || params->vcpu >= d->max_vcpus )
> + return -EINVAL;
> +
> + page = get_page_from_gfn(d, gfn, NULL, P2M_ALLOC);
> + if ( !page )
> + return -EINVAL;
> +
> + if ( !get_page_type(page, PGT_writable_page) )
> + {
> + put_page(page);
> + return -EINVAL;
> + }
> +
> + v = d->vcpu[params->vcpu];
> + v->arch.vpmu.xenpmu_data = __map_domain_page_global(page);
> + if ( !v->arch.vpmu.xenpmu_data )
> + {
> + put_page_and_type(page);
> + return -EINVAL;
> + }
> +
> + vpmu_initialise(v);
> +
> + return 0;
> +}
> +
> +static void pvpmu_finish(struct domain *d, xen_pmu_params_t *params)
> +{
> + struct vcpu *v;
> + uint64_t mfn;
> +
> + if ( params->vcpu < 0 || params->vcpu >= d->max_vcpus )
> + return;
> +
> + v = d->vcpu[params->vcpu];
> + if (v != current)
> + vcpu_pause(v);
> +
> + if ( v->arch.vpmu.xenpmu_data )
> + {
> + mfn = domain_page_map_to_mfn(v->arch.vpmu.xenpmu_data);
> + if ( mfn_valid(mfn) )
> + {
> + unmap_domain_page_global(v->arch.vpmu.xenpmu_data);
> + put_page_and_type(mfn_to_page(mfn));
> + }
> + }
> + vpmu_destroy(v);
> +
> + if (v != current)
> + vcpu_unpause(v);
> +}
>
> long do_xenpmu_op(int op,
> XEN_GUEST_HANDLE_PARAM(xen_pmu_params_t) arg)
> {
> @@ -372,7 +443,19 @@ long do_xenpmu_op(int op,
> XEN_GUEST_HANDLE_PARAM(xen_pmu_params_t) arg)
> return -EFAULT;
> ret = 0;
> break;
> - }
> +
> + case XENPMU_init:
> + if ( copy_from_guest(&pmu_params, arg, 1) )
> + return -EFAULT;
> + ret = pvpmu_init(current->domain, &pmu_params);
> + break;
> +
> + case XENPMU_finish:
> + if ( copy_from_guest(&pmu_params, arg, 1) )
> + return -EFAULT;
> + pvpmu_finish(current->domain, &pmu_params);
> + break;
> + }
>
> return ret;
> }
> diff --git a/xen/common/event_channel.c b/xen/common/event_channel.c
> index db952af..f0aaa63 100644
> --- a/xen/common/event_channel.c
> +++ b/xen/common/event_channel.c
> @@ -108,6 +108,7 @@ static int virq_is_global(uint32_t virq)
> case VIRQ_TIMER:
> case VIRQ_DEBUG:
> case VIRQ_XENOPROF:
> + case VIRQ_XENPMU:
> rc = 0;
> break;
> case VIRQ_ARCH_0 ... VIRQ_ARCH_7:
> diff --git a/xen/include/asm-x86/hvm/vpmu.h
> b/xen/include/asm-x86/hvm/vpmu.h
> index b945e8f..0f3de14 100644
> --- a/xen/include/asm-x86/hvm/vpmu.h
> +++ b/xen/include/asm-x86/hvm/vpmu.h
> @@ -60,6 +60,7 @@ struct vpmu_struct {
> u32 hw_lapic_lvtpc;
> void *context;
> struct arch_vpmu_ops *arch_vpmu_ops;
> + xen_pmu_data_t *xenpmu_data;
> };
>
> /* VPMU states */
> diff --git a/xen/include/public/pmu.h b/xen/include/public/pmu.h
> index f91d935..814e061 100644
> --- a/xen/include/public/pmu.h
> +++ b/xen/include/public/pmu.h
> @@ -25,6 +25,8 @@
> #define XENPMU_mode_set 1
> #define XENPMU_feature_get 2
> #define XENPMU_feature_set 3
> +#define XENPMU_init 4
> +#define XENPMU_finish 5
> /* ` } */
>
> /* Parameters structure for HYPERVISOR_xenpmu_op call */
> diff --git a/xen/include/public/xen.h b/xen/include/public/xen.h
> index a00ab21..2eb5fd7 100644
> --- a/xen/include/public/xen.h
> +++ b/xen/include/public/xen.h
> @@ -161,6 +161,7 @@ DEFINE_XEN_GUEST_HANDLE(xen_ulong_t);
> #define VIRQ_MEM_EVENT 10 /* G. (DOM0) A memory event has occured
> */
> #define VIRQ_XC_RESERVED 11 /* G. Reserved for XenClient
> */
> #define VIRQ_ENOMEM 12 /* G. (DOM0) Low on heap memory
> */
> +#define VIRQ_XENPMU 13 /* V. PMC interrupt
> */
>
> /* Architecture-specific VIRQ definitions. */
> #define VIRQ_ARCH_0 16
> diff --git a/xen/include/xen/softirq.h b/xen/include/xen/softirq.h
> index 0c0d481..5829fa4 100644
> --- a/xen/include/xen/softirq.h
> +++ b/xen/include/xen/softirq.h
> @@ -8,6 +8,7 @@ enum {
> NEW_TLBFLUSH_CLOCK_PERIOD_SOFTIRQ,
> RCU_SOFTIRQ,
> TASKLET_SOFTIRQ,
> + PMU_SOFTIRQ,
> NR_COMMON_SOFTIRQS
> };
>
> --
> 1.8.3.1
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 11/17] x86/VPMU: Add support for PMU register handling on PV guests
2014-04-23 12:50 ` [PATCH v5 RESEND 11/17] x86/VPMU: Add support for PMU register handling on " Boris Ostrovsky
@ 2014-04-26 8:26 ` Tian, Kevin
0 siblings, 0 replies; 44+ messages in thread
From: Tian, Kevin @ 2014-04-26 8:26 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
> Sent: Wednesday, April 23, 2014 8:51 PM
>
> Intercept accesses to PMU MSRs and process them in VPMU module.
>
> Dump VPMU state for all domains (HVM and PV) when requested.
>
Acked-by: Kevin Tian <kevin.tian@intel.com>
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> ---
> xen/arch/x86/domain.c | 3 +-
> xen/arch/x86/hvm/vmx/vpmu_core2.c | 60
> ++++++++++++++++++++++++++++++++-------
> xen/arch/x86/hvm/vpmu.c | 7 +++++
> xen/arch/x86/traps.c | 31 +++++++++++++++++++-
> xen/include/public/pmu.h | 1 +
> 5 files changed, 89 insertions(+), 13 deletions(-)
>
> diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c
> index b615c07..b389abc 100644
> --- a/xen/arch/x86/domain.c
> +++ b/xen/arch/x86/domain.c
> @@ -1995,8 +1995,7 @@ void arch_dump_vcpu_info(struct vcpu *v)
> {
> paging_dump_vcpu_info(v);
>
> - if ( is_hvm_vcpu(v) )
> - vpmu_dump(v);
> + vpmu_dump(v);
> }
>
> void domain_cpuid(
> diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c
> b/xen/arch/x86/hvm/vmx/vpmu_core2.c
> index de1e09d..9eac418 100644
> --- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
> +++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
> @@ -27,6 +27,7 @@
> #include <asm/regs.h>
> #include <asm/types.h>
> #include <asm/apic.h>
> +#include <asm/traps.h>
> #include <asm/msr.h>
> #include <asm/msr-index.h>
> #include <asm/hvm/support.h>
> @@ -297,19 +298,26 @@ static inline void __core2_vpmu_save(struct vcpu
> *v)
> rdmsrl(MSR_CORE_PERF_FIXED_CTR0 + i, fixed_counters[i]);
> for ( i = 0; i < arch_pmc_cnt; i++ )
> rdmsrl(MSR_IA32_PERFCTR0 + i, xen_pmu_cntr_pair[i].counter);
> +
> + if ( is_pv_domain(v->domain) )
> + rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS,
> core2_vpmu_cxt->global_status);
> }
>
> static int core2_vpmu_save(struct vcpu *v)
> {
> struct vpmu_struct *vpmu = vcpu_vpmu(v);
>
> + if ( is_pv_domain(v->domain) )
> + wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0);
> +
> if ( !vpmu_is_set_all(vpmu, VPMU_CONTEXT_SAVE |
> VPMU_CONTEXT_LOADED) )
> return 0;
>
> __core2_vpmu_save(v);
>
> /* Unset PMU MSR bitmap to trap lazy load. */
> - if ( !vpmu_is_set(vpmu, VPMU_RUNNING) &&
> cpu_has_vmx_msr_bitmap )
> + if ( !vpmu_is_set(vpmu, VPMU_RUNNING) &&
> cpu_has_vmx_msr_bitmap
> + && !is_pv_domain(v->domain) )
> core2_vpmu_unset_msr_bitmap(v->arch.hvm_vmx.msr_bitmap);
>
> return 1;
> @@ -339,6 +347,13 @@ static inline void __core2_vpmu_load(struct vcpu *v)
> wrmsrl(MSR_CORE_PERF_FIXED_CTR_CTRL,
> core2_vpmu_cxt->fixed_ctrl);
> wrmsrl(MSR_IA32_DS_AREA, core2_vpmu_cxt->ds_area);
> wrmsrl(MSR_IA32_PEBS_ENABLE, core2_vpmu_cxt->pebs_enable);
> +
> + if ( is_pv_domain(v->domain) )
> + {
> + wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL,
> core2_vpmu_cxt->global_ovf_ctrl);
> + core2_vpmu_cxt->global_ovf_ctrl = 0;
> + wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL,
> core2_vpmu_cxt->global_ctrl);
> + }
> }
>
> static void core2_vpmu_load(struct vcpu *v)
> @@ -426,6 +441,14 @@ static int core2_vpmu_msr_common_check(u32
> msr_index, int *type, int *index)
> return 1;
> }
>
> +static void inject_trap(struct vcpu *v, unsigned int trapno)
> +{
> + if ( !is_pv_domain(v->domain) )
> + hvm_inject_hw_exception(trapno, 0);
> + else
> + send_guest_trap(v->domain, v->vcpu_id, trapno);
> +}
> +
> static int core2_vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
> {
> u64 global_ctrl, non_global_ctrl;
> @@ -452,7 +475,7 @@ static int core2_vpmu_do_wrmsr(unsigned int msr,
> uint64_t msr_content)
> if ( vpmu_is_set(vpmu, VPMU_CPU_HAS_BTS) )
> return 1;
> gdprintk(XENLOG_WARNING, "Debug Store is not
> supported on this cpu\n");
> - hvm_inject_hw_exception(TRAP_gp_fault, 0);
> + inject_trap(v, TRAP_gp_fault);
> return 0;
> }
> }
> @@ -464,11 +487,12 @@ static int core2_vpmu_do_wrmsr(unsigned int msr,
> uint64_t msr_content)
> {
> case MSR_CORE_PERF_GLOBAL_OVF_CTRL:
> core2_vpmu_cxt->global_status &= ~msr_content;
> + wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, msr_content);
> return 1;
> case MSR_CORE_PERF_GLOBAL_STATUS:
> gdprintk(XENLOG_INFO, "Can not write readonly MSR: "
> "MSR_PERF_GLOBAL_STATUS(0x38E)!\n");
> - hvm_inject_hw_exception(TRAP_gp_fault, 0);
> + inject_trap(v, TRAP_gp_fault);
> return 1;
> case MSR_IA32_PEBS_ENABLE:
> if ( msr_content & 1 )
> @@ -484,7 +508,7 @@ static int core2_vpmu_do_wrmsr(unsigned int msr,
> uint64_t msr_content)
> gdprintk(XENLOG_WARNING,
> "Illegal address for IA32_DS_AREA: %#" PRIx64
> "x\n",
> msr_content);
> - hvm_inject_hw_exception(TRAP_gp_fault, 0);
> + inject_trap(v, TRAP_gp_fault);
> return 1;
> }
> core2_vpmu_cxt->ds_area = msr_content;
> @@ -509,10 +533,14 @@ static int core2_vpmu_do_wrmsr(unsigned int msr,
> uint64_t msr_content)
> non_global_ctrl >>= FIXED_CTR_CTRL_BITS;
> global_ctrl >>= 1;
> }
> + core2_vpmu_cxt->global_ctrl = msr_content;
> break;
> case MSR_CORE_PERF_FIXED_CTR_CTRL:
> non_global_ctrl = msr_content;
> - vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL,
> &global_ctrl);
> + if ( !is_pv_domain(v->domain) )
> + vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL,
> &global_ctrl);
> + else
> + rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, global_ctrl);
> global_ctrl >>= 32;
> for ( i = 0; i < fixed_pmc_cnt; i++ )
> {
> @@ -529,7 +557,10 @@ static int core2_vpmu_do_wrmsr(unsigned int msr,
> uint64_t msr_content)
> struct xen_pmu_cntr_pair *xen_pmu_cntr_pair =
> vpmu_reg_pointer(core2_vpmu_cxt, arch_counters);
>
> - vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL,
> &global_ctrl);
> + if ( !is_pv_domain(v->domain) )
> + vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL,
> &global_ctrl);
> + else
> + rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, global_ctrl);
> xen_pmu_cntr_pair[tmp].control = msr_content;
> for ( i = 0; i < arch_pmc_cnt && !pmu_enable; i++ )
> pmu_enable += (global_ctrl >> i) &
> @@ -568,13 +599,19 @@ static int core2_vpmu_do_wrmsr(unsigned int msr,
> uint64_t msr_content)
> inject_gp = 1;
> break;
> }
> - if (inject_gp)
> - hvm_inject_hw_exception(TRAP_gp_fault, 0);
> +
> + if (inject_gp)
> + inject_trap(v, TRAP_gp_fault);
> else
> wrmsrl(msr, msr_content);
> }
> else
> - vmx_write_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL,
> msr_content);
> + {
> + if ( !is_pv_domain(v->domain) )
> + vmx_write_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL,
> msr_content);
> + else
> + wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, msr_content);
> + }
>
> return 1;
> }
> @@ -598,7 +635,10 @@ static int core2_vpmu_do_rdmsr(unsigned int msr,
> uint64_t *msr_content)
> *msr_content = core2_vpmu_cxt->global_status;
> break;
> case MSR_CORE_PERF_GLOBAL_CTRL:
> - vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL,
> msr_content);
> + if ( !is_pv_domain(v->domain) )
> + vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL,
> msr_content);
> + else
> + rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, *msr_content);
> break;
> default:
> rdmsrl(msr, *msr_content);
> diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
> index 68897f6..789eb2a 100644
> --- a/xen/arch/x86/hvm/vpmu.c
> +++ b/xen/arch/x86/hvm/vpmu.c
> @@ -455,6 +455,13 @@ long do_xenpmu_op(int op,
> XEN_GUEST_HANDLE_PARAM(xen_pmu_params_t) arg)
> return -EFAULT;
> pvpmu_finish(current->domain, &pmu_params);
> break;
> +
> + case XENPMU_lvtpc_set:
> + if ( current->arch.vpmu.xenpmu_data == NULL )
> + return -EINVAL;
> +
> vpmu_lvtpc_update(current->arch.vpmu.xenpmu_data->pmu.l.lapic_lvtpc);
> + ret = 0;
> + break;
> }
>
> return ret;
> diff --git a/xen/arch/x86/traps.c b/xen/arch/x86/traps.c
> index 0bd43b9..442d3fb 100644
> --- a/xen/arch/x86/traps.c
> +++ b/xen/arch/x86/traps.c
> @@ -72,6 +72,7 @@
> #include <asm/apic.h>
> #include <asm/mc146818rtc.h>
> #include <asm/hpet.h>
> +#include <asm/hvm/vpmu.h>
> #include <public/arch-x86/cpuid.h>
> #include <xsm/xsm.h>
>
> @@ -865,8 +866,10 @@ void pv_cpuid(struct cpu_user_regs *regs)
> __clear_bit(X86_FEATURE_TOPOEXT % 32, &c);
> break;
>
> + case 0x0000000a: /* Architectural Performance Monitor Features (Intel)
> */
> + break;
> +
> case 0x00000005: /* MONITOR/MWAIT */
> - case 0x0000000a: /* Architectural Performance Monitor Features */
> case 0x0000000b: /* Extended Topology Enumeration */
> case 0x8000000a: /* SVM revision and features */
> case 0x8000001b: /* Instruction Based Sampling */
> @@ -882,6 +885,8 @@ void pv_cpuid(struct cpu_user_regs *regs)
> }
>
> out:
> + vpmu_do_cpuid(regs->eax, &a, &b, &c, &d);
> +
> regs->eax = a;
> regs->ebx = b;
> regs->ecx = c;
> @@ -2497,6 +2502,14 @@ static int emulate_privileged_op(struct
> cpu_user_regs *regs)
> if ( wrmsr_safe(regs->ecx, msr_content) != 0 )
> goto fail;
> break;
> + case MSR_P6_PERFCTR0...MSR_P6_PERFCTR1:
> + case MSR_P6_EVNTSEL0...MSR_P6_EVNTSEL1:
> + case
> MSR_CORE_PERF_FIXED_CTR0...MSR_CORE_PERF_FIXED_CTR2:
> + case
> MSR_CORE_PERF_FIXED_CTR_CTRL...MSR_CORE_PERF_GLOBAL_OVF_CTRL:
> + case
> MSR_AMD_FAM15H_EVNTSEL0...MSR_AMD_FAM15H_PERFCTR5:
> + if ( !vpmu_do_wrmsr(regs->ecx, msr_content) )
> + goto invalid;
> + break;
> default:
> if ( wrmsr_hypervisor_regs(regs->ecx, msr_content) == 1 )
> break;
> @@ -2584,6 +2597,22 @@ static int emulate_privileged_op(struct
> cpu_user_regs *regs)
> regs->eax = (uint32_t)msr_content;
> regs->edx = (uint32_t)(msr_content >> 32);
> break;
> + case MSR_IA32_PERF_CAPABILITIES:
> + /* No extra capabilities are supported */
> + regs->eax = regs->edx = 0;
> + break;
> + case MSR_P6_PERFCTR0...MSR_P6_PERFCTR1:
> + case MSR_P6_EVNTSEL0...MSR_P6_EVNTSEL1:
> + case
> MSR_CORE_PERF_FIXED_CTR0...MSR_CORE_PERF_FIXED_CTR2:
> + case
> MSR_CORE_PERF_FIXED_CTR_CTRL...MSR_CORE_PERF_GLOBAL_OVF_CTRL:
> + case
> MSR_AMD_FAM15H_EVNTSEL0...MSR_AMD_FAM15H_PERFCTR5:
> + if ( vpmu_do_rdmsr(regs->ecx, &msr_content) )
> + {
> + regs->eax = (uint32_t)msr_content;
> + regs->edx = (uint32_t)(msr_content >> 32);
> + break;
> + }
> + goto rdmsr_normal;
> default:
> if ( rdmsr_hypervisor_regs(regs->ecx, &val) )
> {
> diff --git a/xen/include/public/pmu.h b/xen/include/public/pmu.h
> index 814e061..81783de 100644
> --- a/xen/include/public/pmu.h
> +++ b/xen/include/public/pmu.h
> @@ -27,6 +27,7 @@
> #define XENPMU_feature_set 3
> #define XENPMU_init 4
> #define XENPMU_finish 5
> +#define XENPMU_lvtpc_set 6
> /* ` } */
>
> /* Parameters structure for HYPERVISOR_xenpmu_op call */
> --
> 1.8.3.1
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 12/17] x86/VPMU: Handle PMU interrupts for PV guests
2014-04-23 12:50 ` [PATCH v5 RESEND 12/17] x86/VPMU: Handle PMU interrupts for " Boris Ostrovsky
@ 2014-04-26 8:33 ` Tian, Kevin
2014-04-28 14:15 ` Boris Ostrovsky
0 siblings, 1 reply; 44+ messages in thread
From: Tian, Kevin @ 2014-04-26 8:33 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
> Sent: Wednesday, April 23, 2014 8:51 PM
>
> Add support for handling PMU interrupts for PV guests.
>
> VPMU for the interrupted VCPU is unloaded until the guest issues
> XENPMU_flush
> hypercall. This allows the guest to access PMU MSR values that are stored in
> VPMU context which is shared between hypervisor and domain, thus avoiding
> traps to hypervisor.
>
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> ---
> xen/arch/x86/hvm/vpmu.c | 110
> ++++++++++++++++++++++++++++++++++++++++++++---
> xen/include/public/pmu.h | 7 +++
> 2 files changed, 112 insertions(+), 5 deletions(-)
>
> diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
> index 789eb2a..abc4c1f 100644
> --- a/xen/arch/x86/hvm/vpmu.c
> +++ b/xen/arch/x86/hvm/vpmu.c
> int vpmu_do_interrupt(struct cpu_user_regs *regs)
> {
> struct vcpu *v = current;
> - struct vpmu_struct *vpmu = vcpu_vpmu(v);
> + struct vpmu_struct *vpmu;
> +
> + /* dom0 will handle this interrupt */
> + if ( v->domain->domain_id >= DOMID_FIRST_RESERVED )
> + v = dom0->vcpu[smp_processor_id() % dom0->max_vcpus];
> +
> + vpmu = vcpu_vpmu(v);
> + if ( !is_hvm_domain(v->domain) )
> + {
> + /* PV guest or dom0 is doing system profiling */
> + const struct cpu_user_regs *gregs;
> + int err;
a bit misleading. if non-dom0, it should be guest profiling only, right?
Acked-by: Kevin Tian <kevin.tian@intel.com>
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 13/17] x86/VPMU: Add privileged PMU mode
2014-04-23 12:50 ` [PATCH v5 RESEND 13/17] x86/VPMU: Add privileged PMU mode Boris Ostrovsky
@ 2014-04-26 8:39 ` Tian, Kevin
2014-04-28 14:23 ` Boris Ostrovsky
0 siblings, 1 reply; 44+ messages in thread
From: Tian, Kevin @ 2014-04-26 8:39 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
> Sent: Wednesday, April 23, 2014 8:51 PM
>
> Add support for privileged PMU mode which allows privileged domain (dom0)
> profile both itself (and the hypervisor) and the guests. While this mode is on
> profiling in guests is disabled.
>
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> ---
> xen/arch/x86/hvm/vpmu.c | 97
> +++++++++++++++++++++++++++++++++---------------
> xen/arch/x86/traps.c | 6 ++-
> xen/include/public/pmu.h | 3 ++
> 3 files changed, 76 insertions(+), 30 deletions(-)
>
> diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
> index abc4c1f..dc416f9 100644
> --- a/xen/arch/x86/hvm/vpmu.c
> +++ b/xen/arch/x86/hvm/vpmu.c
> @@ -88,7 +88,8 @@ int vpmu_do_wrmsr(unsigned int msr, uint64_t
> msr_content)
> {
> struct vpmu_struct *vpmu = vcpu_vpmu(current);
>
> - if ( !(vpmu_mode & XENPMU_MODE_ON) )
> + if ( (vpmu_mode == XENPMU_MODE_OFF) ||
> + ((vpmu_mode & XENPMU_MODE_PRIV)
> && !is_control_domain(current->domain)) )
> return 0;
>
how about combining above checks into a macro, e.g.
#define vpmu_is_on(mode, vcpu) \
((mode == XENPMU_MODE_ON) || \
((mode & XENPMU_MODE_PRIV) && is_control_domain(vcpu->domain)))
Acked-by: Kevin Tian <kevin.tian@intel.com>
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 14/17] x86/VPMU: Save VPMU state for PV guests during context switch
2014-04-23 12:50 ` [PATCH v5 RESEND 14/17] x86/VPMU: Save VPMU state for PV guests during context switch Boris Ostrovsky
@ 2014-04-26 8:40 ` Tian, Kevin
0 siblings, 0 replies; 44+ messages in thread
From: Tian, Kevin @ 2014-04-26 8:40 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
> Sent: Wednesday, April 23, 2014 8:51 PM
>
> Save VPMU state during context switch for both HVM and PV guests unless we
> are in PMU privileged mode (i.e. dom0 is doing all profiling).
>
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Acked-by: Kevin Tian <kevin.tian@intel.com>
> ---
> xen/arch/x86/domain.c | 12 +++++-------
> 1 file changed, 5 insertions(+), 7 deletions(-)
>
> diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c
> index b389abc..87c3a02 100644
> --- a/xen/arch/x86/domain.c
> +++ b/xen/arch/x86/domain.c
> @@ -1461,16 +1461,14 @@ void context_switch(struct vcpu *prev, struct vcpu
> *next)
> }
>
> if ( prev != next )
> - _update_runstate_area(prev);
> -
> - if ( is_hvm_vcpu(prev) )
> {
> - if ( (prev != next) && (vpmu_mode & XENPMU_MODE_ON) )
> + _update_runstate_area(prev);
> + if ( vpmu_mode & XENPMU_MODE_ON )
> vpmu_save(prev);
> + }
>
> - if ( !list_empty(&prev->arch.hvm_vcpu.tm_list) )
> + if ( is_hvm_vcpu(prev)
> && !list_empty(&prev->arch.hvm_vcpu.tm_list) )
> pt_save_timer(prev);
> - }
>
> local_irq_disable();
>
> @@ -1508,7 +1506,7 @@ void context_switch(struct vcpu *prev, struct vcpu
> *next)
> (next->domain->domain_id != 0));
> }
>
> - if ( is_hvm_vcpu(next) && (prev != next) && (vpmu_mode &
> XENPMU_MODE_ON) )
> + if ( (prev != next) && (vpmu_mode & XENPMU_MODE_ON) )
> /* Must be done with interrupts enabled */
> vpmu_load(next);
>
> --
> 1.8.3.1
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 15/17] x86/VPMU: NMI-based VPMU support
2014-04-23 12:50 ` [PATCH v5 RESEND 15/17] x86/VPMU: NMI-based VPMU support Boris Ostrovsky
@ 2014-04-26 8:48 ` Tian, Kevin
2014-04-28 17:06 ` Boris Ostrovsky
0 siblings, 1 reply; 44+ messages in thread
From: Tian, Kevin @ 2014-04-26 8:48 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
> Sent: Wednesday, April 23, 2014 8:51 PM
>
> Add support for using NMIs as PMU interrupts.
>
> Most of processing is still performed by vpmu_do_interrupt(). However, since
> certain operations are not NMI-safe we defer them to a softint that
> vpmu_do_interrupt()
> will schedule:
> * For PV guests that would be send_guest_vcpu_virq()
> * For HVM guests it's VLAPIC accesses and hvm_get_segment_register() (the
> later
> can be called in privileged profiling mode when the interrupted guest is an
> HVM one).
>
> With send_guest_vcpu_virq() and hvm_get_segment_register() for PV(H) and
> vlapic
> accesses for HVM moved to sofint, the only routines/macros that
> vpmu_do_interrupt()
> calls in NMI mode are:
> * memcpy()
> * querying domain type (is_XX_domain())
> * guest_cpu_user_regs()
> * XLAT_cpu_user_regs()
> * raise_softirq()
> * vcpu_vpmu()
> * vpmu_ops->arch_vpmu_save()
> * vpmu_ops->do_interrupt() (in the future for PVH support)
>
> The latter two only access PMU MSRs with {rd,wr}msrl() (not the _safe
> versions
> which would not be NMI-safe).
>
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
if a SCHEDULE_SOFTIRQ happens before NMI_SOFTIRQ, will it cause any race
condition when accessing previous recorded content in nmi softirq handler?
Thanks
Kevin
> ---
> xen/arch/x86/hvm/svm/vpmu.c | 1 +
> xen/arch/x86/hvm/vmx/vpmu_core2.c | 1 +
> xen/arch/x86/hvm/vpmu.c | 169
> ++++++++++++++++++++++++++++++--------
> 3 files changed, 138 insertions(+), 33 deletions(-)
>
> diff --git a/xen/arch/x86/hvm/svm/vpmu.c b/xen/arch/x86/hvm/svm/vpmu.c
> index 346aa51..04d3b91 100644
> --- a/xen/arch/x86/hvm/svm/vpmu.c
> +++ b/xen/arch/x86/hvm/svm/vpmu.c
> @@ -182,6 +182,7 @@ static inline void context_load(struct vcpu *v)
> }
> }
>
> +/* Must be NMI-safe */
> static void amd_vpmu_load(struct vcpu *v)
> {
> struct vpmu_struct *vpmu = vcpu_vpmu(v);
> diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c
> b/xen/arch/x86/hvm/vmx/vpmu_core2.c
> index 9eac418..e214f01 100644
> --- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
> +++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
> @@ -303,6 +303,7 @@ static inline void __core2_vpmu_save(struct vcpu *v)
> rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS,
> core2_vpmu_cxt->global_status);
> }
>
> +/* Must be NMI-safe */
> static int core2_vpmu_save(struct vcpu *v)
> {
> struct vpmu_struct *vpmu = vcpu_vpmu(v);
> diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
> index dc416f9..cbe8cfd 100644
> --- a/xen/arch/x86/hvm/vpmu.c
> +++ b/xen/arch/x86/hvm/vpmu.c
> @@ -36,6 +36,7 @@
> #include <asm/hvm/svm/svm.h>
> #include <asm/hvm/svm/vmcb.h>
> #include <asm/apic.h>
> +#include <asm/nmi.h>
> #include <public/pmu.h>
>
> /*
> @@ -49,33 +50,57 @@ static void parse_vpmu_param(char *s);
> custom_param("vpmu", parse_vpmu_param);
>
> static DEFINE_PER_CPU(struct vcpu *, last_vcpu);
> +static DEFINE_PER_CPU(struct vcpu *, sampled_vcpu);
> +
> +static uint32_t __read_mostly vpmu_interrupt_type = PMU_APIC_VECTOR;
>
> static void __init parse_vpmu_param(char *s)
> {
> - switch ( parse_bool(s) )
> - {
> - case 0:
> - break;
> - default:
> - if ( !strcmp(s, "bts") )
> - vpmu_features |= XENPMU_FEATURE_INTEL_BTS;
> - else if ( *s )
> + char *ss;
> +
> + vpmu_mode = XENPMU_MODE_ON;
> + if (*s == '\0')
> + return;
> +
> + do {
> + ss = strchr(s, ',');
> + if ( ss )
> + *ss = '\0';
> +
> + switch ( parse_bool(s) )
> {
> - printk("VPMU: unknown flag: %s - vpmu disabled!\n", s);
> + case 0:
> + vpmu_mode = XENPMU_MODE_OFF;
> + return;
> + case -1:
> + if ( !strcmp(s, "nmi") )
> + vpmu_interrupt_type = APIC_DM_NMI;
> + else if ( !strcmp(s, "bts") )
> + vpmu_features |= XENPMU_FEATURE_INTEL_BTS;
> + else if ( !strcmp(s, "priv") )
> + {
> + vpmu_mode &= ~XENPMU_MODE_ON;
> + vpmu_mode |= XENPMU_MODE_PRIV;
> + }
> + else
> + {
> + printk("VPMU: unknown flag: %s - vpmu disabled!\n", s);
> + vpmu_mode = XENPMU_MODE_OFF;
> + return;
> + }
> + default:
> break;
> }
> - /* fall through */
> - case 1:
> - vpmu_mode = XENPMU_MODE_ON;
> - break;
> - }
> +
> + s = ss + 1;
> + } while ( ss );
> }
>
> void vpmu_lvtpc_update(uint32_t val)
> {
> struct vpmu_struct *vpmu = vcpu_vpmu(current);
>
> - vpmu->hw_lapic_lvtpc = PMU_APIC_VECTOR | (val &
> APIC_LVT_MASKED);
> + vpmu->hw_lapic_lvtpc = vpmu_interrupt_type | (val &
> APIC_LVT_MASKED);
>
> /* Postpone APIC updates for PV guests if PMU interrupt is pending */
> if ( !is_pv_domain(current->domain) ||
> @@ -84,6 +109,27 @@ void vpmu_lvtpc_update(uint32_t val)
> apic_write(APIC_LVTPC, vpmu->hw_lapic_lvtpc);
> }
>
> +static void vpmu_send_nmi(struct vcpu *v)
> +{
> + struct vlapic *vlapic;
> + u32 vlapic_lvtpc;
> + unsigned char int_vec;
> +
> + ASSERT( is_hvm_vcpu(v) );
> +
> + vlapic = vcpu_vlapic(v);
> + if ( !is_vlapic_lvtpc_enabled(vlapic) )
> + return;
> +
> + vlapic_lvtpc = vlapic_get_reg(vlapic, APIC_LVTPC);
> + int_vec = vlapic_lvtpc & APIC_VECTOR_MASK;
> +
> + if ( GET_APIC_DELIVERY_MODE(vlapic_lvtpc) == APIC_MODE_FIXED )
> + vlapic_set_irq(vcpu_vlapic(v), int_vec, 0);
> + else
> + v->nmi_pending = 1;
> +}
> +
> int vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content)
> {
> struct vpmu_struct *vpmu = vcpu_vpmu(current);
> @@ -137,6 +183,7 @@ int vpmu_do_rdmsr(unsigned int msr, uint64_t
> *msr_content)
> return 0;
> }
>
> +/* This routine may be called in NMI context */
> int vpmu_do_interrupt(struct cpu_user_regs *regs)
> {
> struct vcpu *v = current;
> @@ -217,9 +264,13 @@ int vpmu_do_interrupt(struct cpu_user_regs *regs)
> memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
> gregs, sizeof(struct cpu_user_regs));
>
> - hvm_get_segment_register(current, x86_seg_cs, &cs);
> - gregs = &v->arch.vpmu.xenpmu_data->pmu.r.regs;
> - gregs->cs = cs.attr.fields.dpl;
> + /* This is unsafe in NMI context, we'll do it in softint handler
> */
> + if ( !(vpmu_interrupt_type & APIC_DM_NMI ) )
> + {
> + hvm_get_segment_register(current, x86_seg_cs, &cs);
> + gregs = &v->arch.vpmu.xenpmu_data->pmu.r.regs;
> + gregs->cs = cs.attr.fields.dpl;
> + }
> }
>
> v->arch.vpmu.xenpmu_data->domain_id =
> current->domain->domain_id;
> @@ -230,30 +281,30 @@ int vpmu_do_interrupt(struct cpu_user_regs *regs)
> apic_write(APIC_LVTPC, vpmu->hw_lapic_lvtpc |
> APIC_LVT_MASKED);
> vpmu->hw_lapic_lvtpc |= APIC_LVT_MASKED;
>
> - send_guest_vcpu_virq(v, VIRQ_XENPMU);
> + if ( vpmu_interrupt_type & APIC_DM_NMI )
> + {
> + per_cpu(sampled_vcpu, smp_processor_id()) = current;
> + raise_softirq(PMU_SOFTIRQ);
> + }
> + else
> + send_guest_vcpu_virq(v, VIRQ_XENPMU);
>
> return 1;
> }
>
> if ( vpmu->arch_vpmu_ops )
> {
> - struct vlapic *vlapic = vcpu_vlapic(v);
> - u32 vlapic_lvtpc;
> - unsigned char int_vec;
> -
> if ( !vpmu->arch_vpmu_ops->do_interrupt(regs) )
> return 0;
>
> - if ( !is_vlapic_lvtpc_enabled(vlapic) )
> - return 1;
> -
> - vlapic_lvtpc = vlapic_get_reg(vlapic, APIC_LVTPC);
> - int_vec = vlapic_lvtpc & APIC_VECTOR_MASK;
> -
> - if ( GET_APIC_DELIVERY_MODE(vlapic_lvtpc) ==
> APIC_MODE_FIXED )
> - vlapic_set_irq(vcpu_vlapic(v), int_vec, 0);
> + if ( vpmu_interrupt_type & APIC_DM_NMI )
> + {
> + per_cpu(sampled_vcpu, smp_processor_id()) = current;
> + raise_softirq(PMU_SOFTIRQ);
> + }
> else
> - v->nmi_pending = 1;
> + vpmu_send_nmi(v);
> +
> return 1;
> }
>
> @@ -301,7 +352,7 @@ void vpmu_save(struct vcpu *v)
> if ( vpmu->arch_vpmu_ops->arch_vpmu_save(v) )
> vpmu_reset(vpmu, VPMU_CONTEXT_LOADED);
>
> - apic_write(APIC_LVTPC, PMU_APIC_VECTOR | APIC_LVT_MASKED);
> + apic_write(APIC_LVTPC, vpmu_interrupt_type | APIC_LVT_MASKED);
> }
>
> void vpmu_load(struct vcpu *v)
> @@ -450,11 +501,48 @@ static void vpmu_unload_all(void)
> }
> }
>
> +/* Process the softirq set by PMU NMI handler */
> +static void pmu_softnmi(void)
> +{
> + struct cpu_user_regs *regs;
> + struct vcpu *v, *sampled = per_cpu(sampled_vcpu, smp_processor_id());
> +
> + if ( (vpmu_mode & XENPMU_MODE_PRIV) ||
> + (sampled->domain->domain_id >= DOMID_FIRST_RESERVED) )
> + v = dom0->vcpu[smp_processor_id() % dom0->max_vcpus];
> + else
> + {
> + if ( is_hvm_domain(sampled->domain) )
> + {
> + vpmu_send_nmi(sampled);
> + return;
> + }
> + v = sampled;
> + }
> +
> + regs = &v->arch.vpmu.xenpmu_data->pmu.r.regs;
> + if ( !is_pv_domain(sampled->domain) )
> + {
> + struct segment_register cs;
> +
> + hvm_get_segment_register(sampled, x86_seg_cs, &cs);
> + regs->cs = cs.attr.fields.dpl;
> + }
> +
> + send_guest_vcpu_virq(v, VIRQ_XENPMU);
> +}
> +
> +int pmu_nmi_interrupt(struct cpu_user_regs *regs, int cpu)
> +{
> + return vpmu_do_interrupt(regs);
> +}
> +
> static int pvpmu_init(struct domain *d, xen_pmu_params_t *params)
> {
> struct vcpu *v;
> struct page_info *page;
> uint64_t gfn = params->d.val;
> + static bool_t __read_mostly pvpmu_initted = 0;
>
> if ( !is_pv_domain(d) )
> return -EINVAL;
> @@ -480,6 +568,21 @@ static int pvpmu_init(struct domain *d,
> xen_pmu_params_t *params)
> return -EINVAL;
> }
>
> + if ( !pvpmu_initted )
> + {
> + if (reserve_lapic_nmi() == 0)
> + set_nmi_callback(pmu_nmi_interrupt);
> + else
> + {
> + printk("Failed to reserve PMU NMI\n");
> + put_page(page);
> + return -EBUSY;
> + }
> + open_softirq(PMU_SOFTIRQ, pmu_softnmi);
> +
> + pvpmu_initted = 1;
> + }
> +
> vpmu_initialise(v);
>
> return 0;
> --
> 1.8.3.1
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 16/17] x86/VPMU: Suport for PVH guests
2014-04-23 12:50 ` [PATCH v5 RESEND 16/17] x86/VPMU: Suport for PVH guests Boris Ostrovsky
@ 2014-04-26 8:50 ` Tian, Kevin
0 siblings, 0 replies; 44+ messages in thread
From: Tian, Kevin @ 2014-04-26 8:50 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
> Sent: Wednesday, April 23, 2014 8:51 PM
>
> Add support for PVH guests. Most of operations are performed as in an HVM
> guest.
> However, interrupt management is done in PV-like manner.
>
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
If others are OK with the various ***_domain checks, I'm OK with it.
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
> ---
> xen/arch/x86/hvm/hvm.c | 3 ++-
> xen/arch/x86/hvm/svm/vpmu.c | 13 +++++++------
> xen/arch/x86/hvm/vmx/vpmu_core2.c | 24 ++++++++++++------------
> xen/arch/x86/hvm/vpmu.c | 34
> ++++++++++++++++++++++------------
> 4 files changed, 43 insertions(+), 31 deletions(-)
>
> diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
> index 69f7e74..1e50c35 100644
> --- a/xen/arch/x86/hvm/hvm.c
> +++ b/xen/arch/x86/hvm/hvm.c
> @@ -3451,7 +3451,8 @@ static hvm_hypercall_t *const
> pvh_hypercall64_table[NR_hypercalls] = {
> [ __HYPERVISOR_physdev_op ] = (hvm_hypercall_t
> *)hvm_physdev_op,
> HYPERCALL(hvm_op),
> HYPERCALL(sysctl),
> - HYPERCALL(domctl)
> + HYPERCALL(domctl),
> + HYPERCALL(xenpmu_op)
> };
>
> int hvm_do_hypercall(struct cpu_user_regs *regs)
> diff --git a/xen/arch/x86/hvm/svm/vpmu.c b/xen/arch/x86/hvm/svm/vpmu.c
> index 04d3b91..0e5dac4 100644
> --- a/xen/arch/x86/hvm/svm/vpmu.c
> +++ b/xen/arch/x86/hvm/svm/vpmu.c
> @@ -162,6 +162,7 @@ static void amd_vpmu_unset_msr_bitmap(struct vcpu
> *v)
> ctxt->msr_bitmap_set = 0;
> }
>
> +/* Must be NMI-safe */
> static int amd_vpmu_do_interrupt(struct cpu_user_regs *regs)
> {
> return 1;
> @@ -243,7 +244,7 @@ static int amd_vpmu_save(struct vcpu *v)
>
> context_save(v);
>
> - if ( is_hvm_domain(v->domain) &&
> + if ( has_hvm_container_domain(v->domain) &&
> !vpmu_is_set(vpmu, VPMU_RUNNING) && ctx->msr_bitmap_set )
> amd_vpmu_unset_msr_bitmap(v);
>
> @@ -286,7 +287,7 @@ static int amd_vpmu_do_wrmsr(unsigned int msr,
> uint64_t msr_content)
> struct vpmu_struct *vpmu = vcpu_vpmu(v);
>
> /* For all counters, enable guest only mode for HVM guest */
> - if ( is_hvm_domain(v->domain) && (get_pmu_reg_type(msr) ==
> MSR_TYPE_CTRL) &&
> + if ( has_hvm_container_domain(v->domain) &&
> (get_pmu_reg_type(msr) == MSR_TYPE_CTRL) &&
> !(is_guest_mode(msr_content)) )
> {
> set_guest_mode(msr_content);
> @@ -300,7 +301,7 @@ static int amd_vpmu_do_wrmsr(unsigned int msr,
> uint64_t msr_content)
> return 1;
> vpmu_set(vpmu, VPMU_RUNNING);
>
> - if ( is_hvm_domain(v->domain) &&
> + if ( has_hvm_container_domain(v->domain) &&
> !((struct xen_pmu_amd_ctxt
> *)vpmu->context)->msr_bitmap_set )
> amd_vpmu_set_msr_bitmap(v);
> }
> @@ -310,7 +311,7 @@ static int amd_vpmu_do_wrmsr(unsigned int msr,
> uint64_t msr_content)
> (is_pmu_enabled(msr_content) == 0) && vpmu_is_set(vpmu,
> VPMU_RUNNING) )
> {
> vpmu_reset(vpmu, VPMU_RUNNING);
> - if ( is_hvm_domain(v->domain) &&
> + if ( has_hvm_container_domain(v->domain) &&
> ((struct xen_pmu_amd_ctxt
> *)vpmu->context)->msr_bitmap_set )
> amd_vpmu_unset_msr_bitmap(v);
> release_pmu_ownship(PMU_OWNER_HVM);
> @@ -382,7 +383,7 @@ static int amd_vpmu_initialise(struct vcpu *v)
> }
> }
>
> - if ( !is_pv_domain(v->domain) )
> + if ( has_hvm_container_domain(v->domain) )
> {
> ctxt = xzalloc_bytes(sizeof(struct xen_pmu_amd_ctxt) +
> sizeof(uint64_t) * AMD_MAX_COUNTERS
> +
> @@ -413,7 +414,7 @@ static void amd_vpmu_destroy(struct vcpu *v)
> if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
> return;
>
> - if ( is_hvm_domain(v->domain) )
> + if ( has_hvm_container_domain(v->domain) )
> {
> if ( ((struct xen_pmu_amd_ctxt
> *)vpmu->context)->msr_bitmap_set )
> amd_vpmu_unset_msr_bitmap(v);
> diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c
> b/xen/arch/x86/hvm/vmx/vpmu_core2.c
> index e214f01..5a07817 100644
> --- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
> +++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
> @@ -299,7 +299,7 @@ static inline void __core2_vpmu_save(struct vcpu *v)
> for ( i = 0; i < arch_pmc_cnt; i++ )
> rdmsrl(MSR_IA32_PERFCTR0 + i, xen_pmu_cntr_pair[i].counter);
>
> - if ( is_pv_domain(v->domain) )
> + if ( !has_hvm_container_domain(v->domain) )
> rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS,
> core2_vpmu_cxt->global_status);
> }
>
> @@ -308,7 +308,7 @@ static int core2_vpmu_save(struct vcpu *v)
> {
> struct vpmu_struct *vpmu = vcpu_vpmu(v);
>
> - if ( is_pv_domain(v->domain) )
> + if ( !has_hvm_container_domain(v->domain) )
> wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0);
>
> if ( !vpmu_is_set_all(vpmu, VPMU_CONTEXT_SAVE |
> VPMU_CONTEXT_LOADED) )
> @@ -318,7 +318,7 @@ static int core2_vpmu_save(struct vcpu *v)
>
> /* Unset PMU MSR bitmap to trap lazy load. */
> if ( !vpmu_is_set(vpmu, VPMU_RUNNING) &&
> cpu_has_vmx_msr_bitmap
> - && !is_pv_domain(v->domain) )
> + && has_hvm_container_domain(v->domain) )
> core2_vpmu_unset_msr_bitmap(v->arch.hvm_vmx.msr_bitmap);
>
> return 1;
> @@ -349,7 +349,7 @@ static inline void __core2_vpmu_load(struct vcpu *v)
> wrmsrl(MSR_IA32_DS_AREA, core2_vpmu_cxt->ds_area);
> wrmsrl(MSR_IA32_PEBS_ENABLE, core2_vpmu_cxt->pebs_enable);
>
> - if ( is_pv_domain(v->domain) )
> + if ( !has_hvm_container_domain(v->domain) )
> {
> wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL,
> core2_vpmu_cxt->global_ovf_ctrl);
> core2_vpmu_cxt->global_ovf_ctrl = 0;
> @@ -436,7 +436,7 @@ static int core2_vpmu_msr_common_check(u32
> msr_index, int *type, int *index)
> {
> __core2_vpmu_load(current);
> vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
> - if ( cpu_has_vmx_msr_bitmap &&
> is_hvm_domain(current->domain) )
> + if ( cpu_has_vmx_msr_bitmap &&
> has_hvm_container_domain(current->domain) )
>
> core2_vpmu_set_msr_bitmap(current->arch.hvm_vmx.msr_bitmap);
> }
> return 1;
> @@ -444,7 +444,7 @@ static int core2_vpmu_msr_common_check(u32
> msr_index, int *type, int *index)
>
> static void inject_trap(struct vcpu *v, unsigned int trapno)
> {
> - if ( !is_pv_domain(v->domain) )
> + if ( has_hvm_container_domain(v->domain) )
> hvm_inject_hw_exception(trapno, 0);
> else
> send_guest_trap(v->domain, v->vcpu_id, trapno);
> @@ -538,7 +538,7 @@ static int core2_vpmu_do_wrmsr(unsigned int msr,
> uint64_t msr_content)
> break;
> case MSR_CORE_PERF_FIXED_CTR_CTRL:
> non_global_ctrl = msr_content;
> - if ( !is_pv_domain(v->domain) )
> + if ( has_hvm_container_domain(v->domain) )
> vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL,
> &global_ctrl);
> else
> rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, global_ctrl);
> @@ -558,7 +558,7 @@ static int core2_vpmu_do_wrmsr(unsigned int msr,
> uint64_t msr_content)
> struct xen_pmu_cntr_pair *xen_pmu_cntr_pair =
> vpmu_reg_pointer(core2_vpmu_cxt, arch_counters);
>
> - if ( !is_pv_domain(v->domain) )
> + if ( has_hvm_container_domain(v->domain) )
> vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL,
> &global_ctrl);
> else
> rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, global_ctrl);
> @@ -608,7 +608,7 @@ static int core2_vpmu_do_wrmsr(unsigned int msr,
> uint64_t msr_content)
> }
> else
> {
> - if ( !is_pv_domain(v->domain) )
> + if ( has_hvm_container_domain(v->domain) )
> vmx_write_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL,
> msr_content);
> else
> wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, msr_content);
> @@ -636,7 +636,7 @@ static int core2_vpmu_do_rdmsr(unsigned int msr,
> uint64_t *msr_content)
> *msr_content = core2_vpmu_cxt->global_status;
> break;
> case MSR_CORE_PERF_GLOBAL_CTRL:
> - if ( !is_pv_domain(v->domain) )
> + if ( has_hvm_container_domain(v->domain) )
> vmx_read_guest_msr(MSR_CORE_PERF_GLOBAL_CTRL,
> msr_content);
> else
> rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, *msr_content);
> @@ -803,7 +803,7 @@ func_out:
> check_pmc_quirk();
>
> /* PV domains can allocate resources immediately */
> - if ( is_pv_domain(v->domain) && !core2_vpmu_alloc_resource(v) )
> + if ( !has_hvm_container_domain(v->domain)
> && !core2_vpmu_alloc_resource(v) )
> return 1;
>
> return 0;
> @@ -816,7 +816,7 @@ static void core2_vpmu_destroy(struct vcpu *v)
> if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
> return;
>
> - if ( is_hvm_domain(v->domain) )
> + if ( has_hvm_container_domain(v->domain) )
> {
> xfree(vpmu->context);
> if ( cpu_has_vmx_msr_bitmap )
> diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
> index cbe8cfd..3645e4c 100644
> --- a/xen/arch/x86/hvm/vpmu.c
> +++ b/xen/arch/x86/hvm/vpmu.c
> @@ -103,7 +103,7 @@ void vpmu_lvtpc_update(uint32_t val)
> vpmu->hw_lapic_lvtpc = vpmu_interrupt_type | (val &
> APIC_LVT_MASKED);
>
> /* Postpone APIC updates for PV guests if PMU interrupt is pending */
> - if ( !is_pv_domain(current->domain) ||
> + if ( !has_hvm_container_domain(current->domain) ||
> !(current->arch.vpmu.xenpmu_data &&
> current->arch.vpmu.xenpmu_data->pmu_flags &
> PMU_CACHED) )
> apic_write(APIC_LVTPC, vpmu->hw_lapic_lvtpc);
> @@ -147,7 +147,7 @@ int vpmu_do_wrmsr(unsigned int msr, uint64_t
> msr_content)
> * and since do_wrmsr may load VPMU context we should save
> * (and unload) it again.
> */
> - if ( !is_hvm_domain(current->domain) &&
> + if ( !has_hvm_container_domain(current->domain) &&
> (current->arch.vpmu.xenpmu_data->pmu_flags &
> PMU_CACHED) )
> {
> vpmu_set(vpmu, VPMU_CONTEXT_SAVE);
> @@ -171,7 +171,7 @@ int vpmu_do_rdmsr(unsigned int msr, uint64_t
> *msr_content)
> {
> int ret = vpmu->arch_vpmu_ops->do_rdmsr(msr, msr_content);
>
> - if ( !is_hvm_domain(current->domain) &&
> + if ( !has_hvm_container_domain(current->domain) &&
> (current->arch.vpmu.xenpmu_data->pmu_flags &
> PMU_CACHED) )
> {
> vpmu_set(vpmu, VPMU_CONTEXT_SAVE);
> @@ -200,13 +200,17 @@ int vpmu_do_interrupt(struct cpu_user_regs *regs)
>
> if ( !is_hvm_domain(v->domain) || (vpmu_mode &
> XENPMU_MODE_PRIV) )
> {
> - /* PV guest or dom0 is doing system profiling */
> + /* PV(H) guest or dom0 is doing system profiling */
> struct cpu_user_regs *gregs;
> int err;
>
> if ( v->arch.vpmu.xenpmu_data->pmu_flags & PMU_CACHED )
> return 1;
>
> + if ( is_pvh_domain(current->domain) && !(vpmu_mode &
> XENPMU_MODE_PRIV) &&
> + !vpmu->arch_vpmu_ops->do_interrupt(regs) )
> + return 0;
> +
> /* PV guest will be reading PMU MSRs from xenpmu_data */
> vpmu_set(vpmu, VPMU_CONTEXT_SAVE |
> VPMU_CONTEXT_LOADED);
> err = vpmu->arch_vpmu_ops->arch_vpmu_save(v);
> @@ -243,7 +247,7 @@ int vpmu_do_interrupt(struct cpu_user_regs *regs)
> else if ( !is_control_domain(current->domain) &&
> !is_idle_vcpu(current) )
> {
> - /* PV guest */
> + /* PV(H) guest */
> gregs = guest_cpu_user_regs();
> memcpy(&v->arch.vpmu.xenpmu_data->pmu.r.regs,
> gregs, sizeof(struct cpu_user_regs));
> @@ -253,7 +257,15 @@ int vpmu_do_interrupt(struct cpu_user_regs *regs)
> regs, sizeof(struct cpu_user_regs));
>
> gregs = &v->arch.vpmu.xenpmu_data->pmu.r.regs;
> - gregs->cs = (current->arch.flags & TF_kernel_mode) ? 0 : 0x3;
> + if ( !is_pvh_domain(current->domain) )
> + gregs->cs = (current->arch.flags & TF_kernel_mode) ? 0 :
> 0x3;
> + else if ( !(vpmu_interrupt_type & APIC_DM_NMI) )
> + {
> + struct segment_register seg_cs;
> +
> + hvm_get_segment_register(current, x86_seg_cs,
> &seg_cs);
> + gregs->cs = seg_cs.attr.fields.dpl;
> + }
> }
> else
> {
> @@ -277,7 +289,8 @@ int vpmu_do_interrupt(struct cpu_user_regs *regs)
> v->arch.vpmu.xenpmu_data->vcpu_id = current->vcpu_id;
> v->arch.vpmu.xenpmu_data->pcpu_id = smp_processor_id();
>
> - v->arch.vpmu.xenpmu_data->pmu_flags |= PMU_CACHED;
> + if ( !is_pvh_domain(current->domain) || (vpmu_mode &
> XENPMU_MODE_PRIV) )
> + v->arch.vpmu.xenpmu_data->pmu_flags |= PMU_CACHED;
> apic_write(APIC_LVTPC, vpmu->hw_lapic_lvtpc |
> APIC_LVT_MASKED);
> vpmu->hw_lapic_lvtpc |= APIC_LVT_MASKED;
>
> @@ -404,7 +417,7 @@ void vpmu_load(struct vcpu *v)
>
> /* Only when PMU is counting, we load PMU context immediately. */
> if ( !vpmu_is_set(vpmu, VPMU_RUNNING) ||
> - (is_pv_domain(v->domain) && vpmu->xenpmu_data->pmu_flags &
> PMU_CACHED) )
> + (!has_hvm_container_domain(v->domain) &&
> vpmu->xenpmu_data->pmu_flags & PMU_CACHED) )
> return;
>
> if ( vpmu->arch_vpmu_ops &&
> vpmu->arch_vpmu_ops->arch_vpmu_load )
> @@ -521,7 +534,7 @@ static void pmu_softnmi(void)
> }
>
> regs = &v->arch.vpmu.xenpmu_data->pmu.r.regs;
> - if ( !is_pv_domain(sampled->domain) )
> + if ( has_hvm_container_domain(sampled->domain) )
> {
> struct segment_register cs;
>
> @@ -544,9 +557,6 @@ static int pvpmu_init(struct domain *d,
> xen_pmu_params_t *params)
> uint64_t gfn = params->d.val;
> static bool_t __read_mostly pvpmu_initted = 0;
>
> - if ( !is_pv_domain(d) )
> - return -EINVAL;
> -
> if ( params->vcpu < 0 || params->vcpu >= d->max_vcpus )
> return -EINVAL;
>
> --
> 1.8.3.1
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 17/17] x86/VPMU: Move VPMU files up from hvm/ directory
2014-04-23 12:50 ` [PATCH v5 RESEND 17/17] x86/VPMU: Move VPMU files up from hvm/ directory Boris Ostrovsky
@ 2014-04-26 8:52 ` Tian, Kevin
0 siblings, 0 replies; 44+ messages in thread
From: Tian, Kevin @ 2014-04-26 8:52 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
> Sent: Wednesday, April 23, 2014 8:51 PM
>
> Since PMU is now not HVM specific we can move VPMU-related files up from
> arch/x86/hvm/ directory.
>
> Specifically:
> arch/x86/hvm/vpmu.c -> arch/x86/vpmu.c
> arch/x86/hvm/svm/vpmu.c -> arch/x86/vpmu_amd.c
> arch/x86/hvm/vmx/vpmu_core2.c -> arch/x86/vpmu_intel.c
> include/asm-x86/hvm/vpmu.h -> include/asm-x86/vpmu.h
>
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Acked-by: Kevin Tian <kevin.tian@intel.com>
> ---
> xen/arch/x86/Makefile | 1 +
> xen/arch/x86/hvm/Makefile | 1 -
> xen/arch/x86/hvm/svm/Makefile | 1 -
> xen/arch/x86/hvm/svm/vpmu.c | 509 ------------------
> xen/arch/x86/hvm/vlapic.c | 2 +-
> xen/arch/x86/hvm/vmx/Makefile | 1 -
> xen/arch/x86/hvm/vmx/vpmu_core2.c | 940 ----------------------------------
> xen/arch/x86/hvm/vpmu.c | 720 --------------------------
> xen/arch/x86/oprofile/op_model_ppro.c | 2 +-
> xen/arch/x86/traps.c | 2 +-
> xen/arch/x86/vpmu.c | 720
> ++++++++++++++++++++++++++
> xen/arch/x86/vpmu_amd.c | 509 ++++++++++++++++++
> xen/arch/x86/vpmu_intel.c | 940
> ++++++++++++++++++++++++++++++++++
> xen/include/asm-x86/hvm/vmx/vmcs.h | 2 +-
> xen/include/asm-x86/hvm/vpmu.h | 99 ----
> xen/include/asm-x86/vpmu.h | 99 ++++
> 16 files changed, 2273 insertions(+), 2275 deletions(-)
> delete mode 100644 xen/arch/x86/hvm/svm/vpmu.c
> delete mode 100644 xen/arch/x86/hvm/vmx/vpmu_core2.c
> delete mode 100644 xen/arch/x86/hvm/vpmu.c
> create mode 100644 xen/arch/x86/vpmu.c
> create mode 100644 xen/arch/x86/vpmu_amd.c
> create mode 100644 xen/arch/x86/vpmu_intel.c
> delete mode 100644 xen/include/asm-x86/hvm/vpmu.h
> create mode 100644 xen/include/asm-x86/vpmu.h
>
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support
2014-04-23 12:50 [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Boris Ostrovsky
` (17 preceding siblings ...)
2014-04-24 9:22 ` [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Tian, Kevin
@ 2014-04-26 8:55 ` Tian, Kevin
18 siblings, 0 replies; 44+ messages in thread
From: Tian, Kevin @ 2014-04-26 8:55 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
> Sent: Wednesday, April 23, 2014 8:50 PM
>
> (Resending v5 per Kevin's request)
Hi, Boris, I've acked most intel related patches, with some comments replied individually.
Thanks
Kevin
>
>
> Here is the fifth version of PV(H) PMU patches.
>
>
> Changes in v5:
>
> * Dropped patch number 2 ("Stop AMD counters when called from
> vpmu_save_force()")
> as no longer needed
> * Added patch number 2 that marks context as loaded before PMU registers
> are
> loaded. This prevents situation where a PMU interrupt may occur while
> context
> is still viewed as not loaded. (This is really a bug fix for exsiting VPMU
> code)
> * Renamed xenpmu.h files to pmu.h
> * More careful use of is_pv_domain(), is_hvm_domain(, is_pvh_domain and
> has_hvm_container_domain(). Also explicitly disabled support for PVH until
> patch 16 to make distinction between usage of the above macros more
> clear.
> * Added support for disabling VPMU support during runtime.
> * Disable VPMUs for non-privileged domains when switching to privileged
> profiling mode
> * Added ARM stub for xen_arch_pmu_t
> * Separated vpmu_mode from vpmu_features
> * Moved CS register query to make sure we use appropriate query mechanism
> for
> various guest types.
> * LVTPC is now set from value in shared area, not copied from dom0
> * Various code and comments cleanup as suggested by Jan.
>
> Changes in v4:
>
> * Added support for PVH guests:
> o changes in pvpmu_init() to accommodate both PV and PVH guests, still in
> patch 10
> o more careful use of is_hvm_domain
> o Additional patch (16)
> * Moved HVM interrupt handling out of vpmu_do_interrupt() for NMI-safe
> handling
> * Fixed dom0's VCPU selection in privileged mode
> * Added a cast in register copy for 32-bit PV guests cpu_user_regs_t in
> vpmu_do_interrupt.
> (don't want to expose compat_cpu_user_regs in a public header)
> * Renamed public structures by prefixing them with "xen_"
> * Added an entry for xenpf_symdata in xlat.lst
> * Fixed pv_cpuid check for vpmu-specific cpuid adjustments
> * Varios code style fixes
> * Eliminated anonymous unions
> * Added more verbiage to NMI patch description
>
>
> Changes in v3:
>
> * Moved PMU MSR banks out from architectural context data structures to
> allow
> for future expansion without protocol changes
> * PMU interrupts can be either NMIs or regular vector interrupts (the latter
> is the default)
> * Context is now marked as PMU_CACHED by the hypervisor code to avoid
> certain
> race conditions with the guest
> * Fixed races with PV guest in MSR access handlers
> * More Intel VPMU cleanup
> * Moved NMI-unsafe code from NMI handler
> * Dropped changes to vcpu->is_running
> * Added LVTPC apic handling (cached for PV guests)
> * Separated privileged profiling mode into a standalone patch
> * Separated NMI handling into a standalone patch
>
>
> Changes in v2:
>
> * Xen symbols are exported as data structure (as opoosed to a set of
> formatted
> strings in v1). Even though one symbol per hypercall is returned performance
> appears to be acceptable: reading whole file from dom0 userland takes on
> average
> about twice as long as reading /proc/kallsyms
> * More cleanup of Intel VPMU code to simplify publicly exported structures
> * There is an architecture-independent and x86-specific public include files
> (ARM
> has a stub)
> * General cleanup of public include files to make them more presentable (and
> to make auto doc generation better)
> * Setting of vcpu->is_running is now done on ARM in schedule_tail as well
> (making
> changes to common/schedule.c architecture-independent). Note that this is
> not
> tested since I don't have access to ARM hardware.
> * PCPU ID of interrupted processor is now passed to PV guest
>
>
> The following patch series adds PMU support in Xen for PV(H)
> guests. There is a companion patchset for Linux kernel. In addition,
> another set of changes will be provided (later) for userland perf
> code.
>
> This version has following limitations:
> * For accurate profiling of dom0/Xen dom0 VCPUs should be pinned.
> * Hypervisor code is only profiled on processors that have running dom0
> VCPUs
> on them.
> * No backtrace support.
> * Will fail to load under XSM: we ran out of bits in permissions vector and
> this needs to be fixed separately
>
> A few notes that may help reviewing:
>
> * A shared data structure (xenpmu_data_t) between each PV VPCU and
> hypervisor
> CPU is used for passing registers' values as well as PMU state at the time of
> PMU interrupt.
> * PMU interrupts are taken by hypervisor either as NMIs or regular vector
> interrupts for both HVM and PV(H). The interrupts are sent as NMIs to HVM
> guests
> and as virtual interrupts to PV(H) guests
> * PV guest's interrupt handler does not read/write PMU MSRs directly. Instead,
> it
> accesses xenpmu_data_t and flushes it to HW it before returning.
> * PMU mode is controlled at runtime via
> /sys/hypervisor/pmu/pmu/{pmu_mode,pmu_flags}
> in addition to 'vpmu' boot option (which is preserved for back compatibility).
> The following modes are provided:
> * disable: VPMU is off
> * enable: VPMU is on. Guests can profile themselves, dom0 profiles itself
> and Xen
> * priv_enable: dom0 only profiling. dom0 collects samples for everyone.
> Sampling
> in guests is suspended.
> * /proc/xen/xensyms file exports hypervisor's symbols to dom0 (similar to
> /proc/kallsyms)
> * VPMU infrastructure is now used for HVM, PV and PVH and therefore has
> been moved
> up from hvm subtree
>
>
> Boris Ostrovsky (17):
> common/symbols: Export hypervisor symbols to privileged guest
> VPMU: Mark context LOADED before registers are loaded
> x86/VPMU: Minor VPMU cleanup
> intel/VPMU: Clean up Intel VPMU code
> x86/VPMU: Handle APIC_LVTPC accesses
> intel/VPMU: MSR_CORE_PERF_GLOBAL_CTRL should be initialized to zero
> x86/VPMU: Add public xenpmu.h
> x86/VPMU: Make vpmu not HVM-specific
> x86/VPMU: Interface for setting PMU mode and flags
> x86/VPMU: Initialize PMU for PV guests
> x86/VPMU: Add support for PMU register handling on PV guests
> x86/VPMU: Handle PMU interrupts for PV guests
> x86/VPMU: Add privileged PMU mode
> x86/VPMU: Save VPMU state for PV guests during context switch
> x86/VPMU: NMI-based VPMU support
> x86/VPMU: Suport for PVH guests
> x86/VPMU: Move VPMU files up from hvm/ directory
>
> xen/arch/x86/Makefile | 1 +
> xen/arch/x86/domain.c | 15 +-
> xen/arch/x86/hvm/Makefile | 1 -
> xen/arch/x86/hvm/hvm.c | 3 +-
> xen/arch/x86/hvm/svm/Makefile | 1 -
> xen/arch/x86/hvm/svm/svm.c | 6 +-
> xen/arch/x86/hvm/svm/vpmu.c | 494 ----------------
> xen/arch/x86/hvm/vlapic.c | 5 +-
> xen/arch/x86/hvm/vmx/Makefile | 1 -
> xen/arch/x86/hvm/vmx/vmcs.c | 55 ++
> xen/arch/x86/hvm/vmx/vmx.c | 6 +-
> xen/arch/x86/hvm/vmx/vpmu_core2.c | 931 ------------------------------
> xen/arch/x86/hvm/vpmu.c | 266 ---------
> xen/arch/x86/oprofile/op_model_ppro.c | 8 +-
> xen/arch/x86/platform_hypercall.c | 18 +
> xen/arch/x86/traps.c | 35 +-
> xen/arch/x86/vpmu.c | 720
> +++++++++++++++++++++++
> xen/arch/x86/vpmu_amd.c | 509 +++++++++++++++++
> xen/arch/x86/vpmu_intel.c | 940
> +++++++++++++++++++++++++++++++
> xen/arch/x86/x86_64/compat/entry.S | 4 +
> xen/arch/x86/x86_64/entry.S | 4 +
> xen/arch/x86/x86_64/platform_hypercall.c | 2 +
> xen/common/event_channel.c | 1 +
> xen/common/symbols.c | 50 +-
> xen/common/vsprintf.c | 2 +-
> xen/include/asm-x86/domain.h | 2 +
> xen/include/asm-x86/hvm/vcpu.h | 3 -
> xen/include/asm-x86/hvm/vmx/vmcs.h | 4 +-
> xen/include/asm-x86/hvm/vmx/vpmu_core2.h | 51 --
> xen/include/asm-x86/hvm/vpmu.h | 104 ----
> xen/include/asm-x86/vpmu.h | 99 ++++
> xen/include/public/arch-arm.h | 3 +
> xen/include/public/arch-x86/pmu.h | 63 +++
> xen/include/public/platform.h | 16 +
> xen/include/public/pmu.h | 99 ++++
> xen/include/public/xen.h | 2 +
> xen/include/xen/hypercall.h | 4 +
> xen/include/xen/softirq.h | 1 +
> xen/include/xen/symbols.h | 6 +-
> xen/include/xlat.lst | 1 +
> 40 files changed, 2661 insertions(+), 1875 deletions(-)
> delete mode 100644 xen/arch/x86/hvm/svm/vpmu.c
> delete mode 100644 xen/arch/x86/hvm/vmx/vpmu_core2.c
> delete mode 100644 xen/arch/x86/hvm/vpmu.c
> create mode 100644 xen/arch/x86/vpmu.c
> create mode 100644 xen/arch/x86/vpmu_amd.c
> create mode 100644 xen/arch/x86/vpmu_intel.c
> delete mode 100644 xen/include/asm-x86/hvm/vmx/vpmu_core2.h
> delete mode 100644 xen/include/asm-x86/hvm/vpmu.h
> create mode 100644 xen/include/asm-x86/vpmu.h
> create mode 100644 xen/include/public/arch-x86/pmu.h
> create mode 100644 xen/include/public/pmu.h
>
> --
> 1.8.3.1
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 07/17] x86/VPMU: Add public xenpmu.h
2014-04-26 8:21 ` Tian, Kevin
@ 2014-04-28 9:03 ` Jan Beulich
2014-04-28 9:09 ` Tian, Kevin
0 siblings, 1 reply; 44+ messages in thread
From: Jan Beulich @ 2014-04-28 9:03 UTC (permalink / raw)
To: Kevin Tian
Cc: keir, suravee.suthikulpanit, andrew.cooper3, Eddie Dong,
Donald D Dugger, xen-devel, dietmar.hahn, Jun Nakajima,
Boris Ostrovsky
>>> On 26.04.14 at 10:21, <kevin.tian@intel.com> wrote:
>> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
>> +struct xen_arch_pmu {
>> + union {
>> + struct cpu_user_regs regs;
>> + uint8_t pad1[256];
>> + } r;
>> + union {
>> + uint32_t lapic_lvtpc;
>> + uint64_t pad2;
>> + } l;
>> + union {
>> + struct xen_pmu_amd_ctxt amd;
>> + struct xen_pmu_intel_ctxt intel;
>> + uint8_t pad3[XENPMU_CTXT_PAD_SZ];
>> + } c;
>> +};
>
> 'xen_' prefix is meaningless here, and suppose to sustain vpmu in the names.
If these were field names, I'd agree. But I specifically asked for xen_
prefixes on anything going at some kind of global scope (i.e. structure
name tags here).
Jan
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 07/17] x86/VPMU: Add public xenpmu.h
2014-04-28 9:03 ` Jan Beulich
@ 2014-04-28 9:09 ` Tian, Kevin
0 siblings, 0 replies; 44+ messages in thread
From: Tian, Kevin @ 2014-04-28 9:09 UTC (permalink / raw)
To: Jan Beulich
Cc: keir, suravee.suthikulpanit, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, Nakajima, Jun,
Boris Ostrovsky
> From: Jan Beulich [mailto:JBeulich@suse.com]
> Sent: Monday, April 28, 2014 5:03 PM
>
> >>> On 26.04.14 at 10:21, <kevin.tian@intel.com> wrote:
> >> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
> >> +struct xen_arch_pmu {
> >> + union {
> >> + struct cpu_user_regs regs;
> >> + uint8_t pad1[256];
> >> + } r;
> >> + union {
> >> + uint32_t lapic_lvtpc;
> >> + uint64_t pad2;
> >> + } l;
> >> + union {
> >> + struct xen_pmu_amd_ctxt amd;
> >> + struct xen_pmu_intel_ctxt intel;
> >> + uint8_t pad3[XENPMU_CTXT_PAD_SZ];
> >> + } c;
> >> +};
> >
> > 'xen_' prefix is meaningless here, and suppose to sustain vpmu in the names.
>
> If these were field names, I'd agree. But I specifically asked for xen_
> prefixes on anything going at some kind of global scope (i.e. structure
> name tags here).
>
Then it's fine to me as long as it's the common practice.
Thanks
Kevin
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 03/17] x86/VPMU: Minor VPMU cleanup
2014-04-26 8:20 ` Tian, Kevin
@ 2014-04-28 13:52 ` Boris Ostrovsky
0 siblings, 0 replies; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-28 13:52 UTC (permalink / raw)
To: Tian, Kevin
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
On 04/26/2014 04:20 AM, Tian, Kevin wrote:
>> diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c
>> b/xen/arch/x86/hvm/vmx/vpmu_core2.c
>> index 8aa7cb2..1e32ff3 100644
>> --- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
>> +++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
>> @@ -326,10 +326,7 @@ static int core2_vpmu_save(struct vcpu *v)
>> {
>> struct vpmu_struct *vpmu = vcpu_vpmu(v);
>>
>> - if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_SAVE) )
>> - return 0;
>> -
>> - if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) )
>> + if ( !vpmu_is_set_all(vpmu, VPMU_CONTEXT_SAVE |
>> VPMU_CONTEXT_LOADED) )
>> return 0;
>>
>> __core2_vpmu_save(v);
> right below you miss a bitmap check:
>
> /* Unset PMU MSR bitmap to trap lazy load. */
> if ( !vpmu_is_set(vpmu, VPMU_RUNNING) && cpu_has_vmx_msr_bitmap )
> core2_vpmu_unset_msr_bitmap(v->arch.hvm_vmx.msr_bitmap);
You mean is_hvm_domain()? Yes, (although this check does appears in a
later patch). I'll move it here.
-boris
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 04/17] intel/VPMU: Clean up Intel VPMU code
2014-04-26 8:20 ` Tian, Kevin
@ 2014-04-28 14:00 ` Boris Ostrovsky
0 siblings, 0 replies; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-28 14:00 UTC (permalink / raw)
To: Tian, Kevin
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
On 04/26/2014 04:20 AM, Tian, Kevin wrote:
>> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
>> Sent: Wednesday, April 23, 2014 8:50 PM
>>
>> Remove struct pmumsr and core2_pmu_enable. Replace static MSR structures
>> with
>> fields in core2_vpmu_context.
>>
>> Call core2_get_pmc_count() once, during initialization.
>>
>> Properly clean up when core2_vpmu_alloc_resource() fails and add routines
>> to remove MSRs from VMCS.
>>
>>
>> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> it's a good cleanup in general. ack with two small comments later.
>
> Acked-by: Kevin Tian <kevin.tian@intel.com>
>
>
>> ---
>> xen/arch/x86/hvm/vmx/vmcs.c | 55 ++++++
>> xen/arch/x86/hvm/vmx/vpmu_core2.c | 310
>> ++++++++++++++-----------------
>> xen/include/asm-x86/hvm/vmx/vmcs.h | 2 +
>> xen/include/asm-x86/hvm/vmx/vpmu_core2.h | 19 --
>> 4 files changed, 199 insertions(+), 187 deletions(-)
>>
>> diff --git a/xen/arch/x86/hvm/vmx/vmcs.c b/xen/arch/x86/hvm/vmx/vmcs.c
>> index 44f33cb..5f86b17 100644
>> --- a/xen/arch/x86/hvm/vmx/vmcs.c
>> +++ b/xen/arch/x86/hvm/vmx/vmcs.c
>> @@ -1205,6 +1205,34 @@ int vmx_add_guest_msr(u32 msr)
>> return 0;
>> }
>>
>> +void vmx_rm_guest_msr(u32 msr)
>> +{
>> + struct vcpu *curr = current;
>> + unsigned int idx, msr_count = curr->arch.hvm_vmx.msr_count;
>> + struct vmx_msr_entry *msr_area = curr->arch.hvm_vmx.msr_area;
>> +
>> + if ( msr_area == NULL )
>> + return;
>> +
>> + for ( idx = 0; idx < msr_count; idx++ )
>> + if ( msr_area[idx].index == msr )
>> + break;
>> +
>> + if ( idx == msr_count )
>> + return;
>> +
>> + for ( ; idx < msr_count - 1; idx++ )
>> + {
>> + msr_area[idx].index = msr_area[idx + 1].index;
>> + msr_area[idx].data = msr_area[idx + 1].data;
>> + }
>> + msr_area[msr_count - 1].index = 0;
>> +
>> + curr->arch.hvm_vmx.msr_count = --msr_count;
>> + __vmwrite(VM_EXIT_MSR_STORE_COUNT, msr_count);
>> + __vmwrite(VM_ENTRY_MSR_LOAD_COUNT, msr_count);
>> +}
>> +
>> int vmx_add_host_load_msr(u32 msr)
>> {
>> struct vcpu *curr = current;
>> @@ -1235,6 +1263,33 @@ int vmx_add_host_load_msr(u32 msr)
>> return 0;
>> }
>>
>> +void vmx_rm_host_load_msr(u32 msr)
>> +{
>> + struct vcpu *curr = current;
>> + unsigned int idx, msr_count = curr->arch.hvm_vmx.host_msr_count;
>> + struct vmx_msr_entry *msr_area =
>> curr->arch.hvm_vmx.host_msr_area;
>> +
>> + if ( msr_area == NULL )
>> + return;
>> +
>> + for ( idx = 0; idx < msr_count; idx++ )
>> + if ( msr_area[idx].index == msr )
>> + break;
>> +
>> + if ( idx == msr_count )
>> + return;
>> +
>> + for ( ; idx < msr_count - 1; idx++ )
>> + {
>> + msr_area[idx].index = msr_area[idx + 1].index;
>> + msr_area[idx].data = msr_area[idx + 1].data;
>> + }
>> + msr_area[msr_count - 1].index = 0;
>> +
>> + curr->arch.hvm_vmx.host_msr_count = --msr_count;
>> + __vmwrite(VM_EXIT_MSR_LOAD_COUNT, msr_count);
>> +}
>> +
> suggest to combine common code in above two 'rm' functions. You can pass in
> a msr_area pointer/count , and only last several lines actually differ.
I then should see if I can merge vmx_add_guest_msr/vmx_add_host_load_msr
as well since they have similarities too.
>
>> void vmx_set_eoi_exit_bitmap(struct vcpu *v, u8 vector)
>> {
>> if ( !test_and_set_bit(vector, v->arch.hvm_vmx.eoi_exit_bitmap) )
>> diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c
>> b/xen/arch/x86/hvm/vmx/vpmu_core2.c
>> index 1e32ff3..513eca4 100644
>> --- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
>> +++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
>> @@ -69,6 +69,26 @@
>> static bool_t __read_mostly full_width_write;
>>
>> /*
>> + * MSR_CORE_PERF_FIXED_CTR_CTRL contains the configuration of all fixed
>> + * counters. 4 bits for every counter.
>> + */
>> +#define FIXED_CTR_CTRL_BITS 4
>> +#define FIXED_CTR_CTRL_MASK ((1 << FIXED_CTR_CTRL_BITS) - 1)
>> +
>> +#define VPMU_CORE2_MAX_FIXED_PMCS 4
>> +struct core2_vpmu_context {
>> + u64 fixed_ctrl;
>> + u64 ds_area;
>> + u64 pebs_enable;
> just stay 'pebs' to be consistent.
The name is was chosen to reflect the MSR name (MSR_IA32_PEBS_ENABLE).
-boris
>
>> + u64 global_ovf_status;
>> + u64 fix_counters[VPMU_CORE2_MAX_FIXED_PMCS];
>> + struct arch_msr_pair arch_msr_pair[1];
>> +};
>> +
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 05/17] x86/VPMU: Handle APIC_LVTPC accesses
2014-04-26 8:20 ` Tian, Kevin
@ 2014-04-28 14:05 ` Boris Ostrovsky
0 siblings, 0 replies; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-28 14:05 UTC (permalink / raw)
To: Tian, Kevin
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
On 04/26/2014 04:20 AM, Tian, Kevin wrote:
>> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
>> Sent: Wednesday, April 23, 2014 8:50 PM
>>
>> Update APIC_LVTPC vector when HVM guest writes to it.
>>
>> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> Acked-by: Kevin Tian <kevin.tian@intel.com>, with one comment.
>
>> @@ -230,18 +238,18 @@ void vpmu_initialise(struct vcpu *v)
>> case X86_VENDOR_AMD:
>> if ( svm_vpmu_initialise(v, opt_vpmu_enabled) != 0 )
>> opt_vpmu_enabled = 0;
>> - break;
>> + return;
>>
>> case X86_VENDOR_INTEL:
>> if ( vmx_vpmu_initialise(v, opt_vpmu_enabled) != 0 )
>> opt_vpmu_enabled = 0;
>> - break;
>> + return;
>>
>> default:
>> printk("VPMU: Initialization failed. "
>> "Unknown CPU vendor %d\n", vendor);
>> opt_vpmu_enabled = 0;
>> - break;
>> + return;
>> }
>> }
>>
> not understand break->return change here
Hmm... I am sure there was a perfectly good reason why I did this ;-).
Perhaps at some point I had something at the end of the routine that I
wasn't supposed to be executed if initialization failed. But it's not
there now so I'll revert these changes (unless I find why I did this).
-boris
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 12/17] x86/VPMU: Handle PMU interrupts for PV guests
2014-04-26 8:33 ` Tian, Kevin
@ 2014-04-28 14:15 ` Boris Ostrovsky
0 siblings, 0 replies; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-28 14:15 UTC (permalink / raw)
To: Tian, Kevin
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
On 04/26/2014 04:33 AM, Tian, Kevin wrote:
>> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
>> Sent: Wednesday, April 23, 2014 8:51 PM
>>
>> Add support for handling PMU interrupts for PV guests.
>>
>> VPMU for the interrupted VCPU is unloaded until the guest issues
>> XENPMU_flush
>> hypercall. This allows the guest to access PMU MSR values that are stored in
>> VPMU context which is shared between hypervisor and domain, thus avoiding
>> traps to hypervisor.
>>
>> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
>> ---
>> xen/arch/x86/hvm/vpmu.c | 110
>> ++++++++++++++++++++++++++++++++++++++++++++---
>> xen/include/public/pmu.h | 7 +++
>> 2 files changed, 112 insertions(+), 5 deletions(-)
>>
>> diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
>> index 789eb2a..abc4c1f 100644
>> --- a/xen/arch/x86/hvm/vpmu.c
>> +++ b/xen/arch/x86/hvm/vpmu.c
>> int vpmu_do_interrupt(struct cpu_user_regs *regs)
>> {
>> struct vcpu *v = current;
>> - struct vpmu_struct *vpmu = vcpu_vpmu(v);
>> + struct vpmu_struct *vpmu;
>> +
>> + /* dom0 will handle this interrupt */
>> + if ( v->domain->domain_id >= DOMID_FIRST_RESERVED )
>> + v = dom0->vcpu[smp_processor_id() % dom0->max_vcpus];
>> +
>> + vpmu = vcpu_vpmu(v);
>> + if ( !is_hvm_domain(v->domain) )
>> + {
>> + /* PV guest or dom0 is doing system profiling */
>> + const struct cpu_user_regs *gregs;
>> + int err;
> a bit misleading. if non-dom0, it should be guest profiling only, right?
Right. I meant that either a regular PV guest profiling itself or dom0
profiling itself and the hypervisor. I possibly also meant here
XENPMU_MODE_PRIV mode (where dom0 profiles everyone --- itself,
hypervisor and all guests) but that it introduced in a later patch and
shouldn't be here yet)
I'll re-phrase it.
-boris
>
> Acked-by: Kevin Tian <kevin.tian@intel.com>
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 13/17] x86/VPMU: Add privileged PMU mode
2014-04-26 8:39 ` Tian, Kevin
@ 2014-04-28 14:23 ` Boris Ostrovsky
0 siblings, 0 replies; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-28 14:23 UTC (permalink / raw)
To: Tian, Kevin
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
On 04/26/2014 04:39 AM, Tian, Kevin wrote:
>> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
>> Sent: Wednesday, April 23, 2014 8:51 PM
>>
>> Add support for privileged PMU mode which allows privileged domain (dom0)
>> profile both itself (and the hypervisor) and the guests. While this mode is on
>> profiling in guests is disabled.
>>
>> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
>> ---
>> xen/arch/x86/hvm/vpmu.c | 97
>> +++++++++++++++++++++++++++++++++---------------
>> xen/arch/x86/traps.c | 6 ++-
>> xen/include/public/pmu.h | 3 ++
>> 3 files changed, 76 insertions(+), 30 deletions(-)
>>
>> diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
>> index abc4c1f..dc416f9 100644
>> --- a/xen/arch/x86/hvm/vpmu.c
>> +++ b/xen/arch/x86/hvm/vpmu.c
>> @@ -88,7 +88,8 @@ int vpmu_do_wrmsr(unsigned int msr, uint64_t
>> msr_content)
>> {
>> struct vpmu_struct *vpmu = vcpu_vpmu(current);
>>
>> - if ( !(vpmu_mode & XENPMU_MODE_ON) )
>> + if ( (vpmu_mode == XENPMU_MODE_OFF) ||
>> + ((vpmu_mode & XENPMU_MODE_PRIV)
>> && !is_control_domain(current->domain)) )
>> return 0;
>>
> how about combining above checks into a macro, e.g.
>
> #define vpmu_is_on(mode, vcpu) \
> ((mode == XENPMU_MODE_ON) || \
> ((mode & XENPMU_MODE_PRIV) && is_control_domain(vcpu->domain)))
I am not sure it's worth it for just two appearances of this code
fragment. I'll see if this is more common though.
-boris
>
> Acked-by: Kevin Tian <kevin.tian@intel.com>
^ permalink raw reply [flat|nested] 44+ messages in thread
* Re: [PATCH v5 RESEND 15/17] x86/VPMU: NMI-based VPMU support
2014-04-26 8:48 ` Tian, Kevin
@ 2014-04-28 17:06 ` Boris Ostrovsky
0 siblings, 0 replies; 44+ messages in thread
From: Boris Ostrovsky @ 2014-04-28 17:06 UTC (permalink / raw)
To: Tian, Kevin
Cc: keir, Nakajima, Jun, andrew.cooper3, Dong, Eddie, Dugger,
Donald D, xen-devel, dietmar.hahn, JBeulich,
suravee.suthikulpanit
On 04/26/2014 04:48 AM, Tian, Kevin wrote:
>> From: Boris Ostrovsky [mailto:boris.ostrovsky@oracle.com]
>> Sent: Wednesday, April 23, 2014 8:51 PM
>>
>> Add support for using NMIs as PMU interrupts.
>>
>> Most of processing is still performed by vpmu_do_interrupt(). However, since
>> certain operations are not NMI-safe we defer them to a softint that
>> vpmu_do_interrupt()
>> will schedule:
>> * For PV guests that would be send_guest_vcpu_virq()
>> * For HVM guests it's VLAPIC accesses and hvm_get_segment_register() (the
>> later
>> can be called in privileged profiling mode when the interrupted guest is an
>> HVM one).
>>
>> With send_guest_vcpu_virq() and hvm_get_segment_register() for PV(H) and
>> vlapic
>> accesses for HVM moved to sofint, the only routines/macros that
>> vpmu_do_interrupt()
>> calls in NMI mode are:
>> * memcpy()
>> * querying domain type (is_XX_domain())
>> * guest_cpu_user_regs()
>> * XLAT_cpu_user_regs()
>> * raise_softirq()
>> * vcpu_vpmu()
>> * vpmu_ops->arch_vpmu_save()
>> * vpmu_ops->do_interrupt() (in the future for PVH support)
>>
>> The latter two only access PMU MSRs with {rd,wr}msrl() (not the _safe
>> versions
>> which would not be NMI-safe).
>>
>> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> if a SCHEDULE_SOFTIRQ happens before NMI_SOFTIRQ, will it cause any race
> condition when accessing previous recorded content in nmi softirq handler?
I think you are right.
I in fact had an earlier version where I'd put the record into a linked
list but when I later looked at that code again I took it out because I
thought it was unnecessary. But now that you mentioned it I may need to
resurrect that code. Let me think about this again.
-boris
^ permalink raw reply [flat|nested] 44+ messages in thread
end of thread, other threads:[~2014-04-28 17:06 UTC | newest]
Thread overview: 44+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-04-23 12:50 [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Boris Ostrovsky
2014-04-23 12:50 ` [PATCH v5 RESEND 01/17] common/symbols: Export hypervisor symbols to privileged guest Boris Ostrovsky
2014-04-23 12:50 ` [PATCH v5 RESEND 02/17] VPMU: Mark context LOADED before registers are loaded Boris Ostrovsky
2014-04-26 8:20 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 03/17] x86/VPMU: Minor VPMU cleanup Boris Ostrovsky
2014-04-26 8:20 ` Tian, Kevin
2014-04-28 13:52 ` Boris Ostrovsky
2014-04-23 12:50 ` [PATCH v5 RESEND 04/17] intel/VPMU: Clean up Intel VPMU code Boris Ostrovsky
2014-04-26 8:20 ` Tian, Kevin
2014-04-28 14:00 ` Boris Ostrovsky
2014-04-23 12:50 ` [PATCH v5 RESEND 05/17] x86/VPMU: Handle APIC_LVTPC accesses Boris Ostrovsky
2014-04-26 8:20 ` Tian, Kevin
2014-04-28 14:05 ` Boris Ostrovsky
2014-04-23 12:50 ` [PATCH v5 RESEND 06/17] intel/VPMU: MSR_CORE_PERF_GLOBAL_CTRL should be initialized to zero Boris Ostrovsky
2014-04-26 8:20 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 07/17] x86/VPMU: Add public xenpmu.h Boris Ostrovsky
2014-04-26 8:21 ` Tian, Kevin
2014-04-28 9:03 ` Jan Beulich
2014-04-28 9:09 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 08/17] x86/VPMU: Make vpmu not HVM-specific Boris Ostrovsky
2014-04-26 8:21 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 09/17] x86/VPMU: Interface for setting PMU mode and flags Boris Ostrovsky
2014-04-26 8:21 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 10/17] x86/VPMU: Initialize PMU for PV guests Boris Ostrovsky
2014-04-26 8:21 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 11/17] x86/VPMU: Add support for PMU register handling on " Boris Ostrovsky
2014-04-26 8:26 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 12/17] x86/VPMU: Handle PMU interrupts for " Boris Ostrovsky
2014-04-26 8:33 ` Tian, Kevin
2014-04-28 14:15 ` Boris Ostrovsky
2014-04-23 12:50 ` [PATCH v5 RESEND 13/17] x86/VPMU: Add privileged PMU mode Boris Ostrovsky
2014-04-26 8:39 ` Tian, Kevin
2014-04-28 14:23 ` Boris Ostrovsky
2014-04-23 12:50 ` [PATCH v5 RESEND 14/17] x86/VPMU: Save VPMU state for PV guests during context switch Boris Ostrovsky
2014-04-26 8:40 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 15/17] x86/VPMU: NMI-based VPMU support Boris Ostrovsky
2014-04-26 8:48 ` Tian, Kevin
2014-04-28 17:06 ` Boris Ostrovsky
2014-04-23 12:50 ` [PATCH v5 RESEND 16/17] x86/VPMU: Suport for PVH guests Boris Ostrovsky
2014-04-26 8:50 ` Tian, Kevin
2014-04-23 12:50 ` [PATCH v5 RESEND 17/17] x86/VPMU: Move VPMU files up from hvm/ directory Boris Ostrovsky
2014-04-26 8:52 ` Tian, Kevin
2014-04-24 9:22 ` [PATCH v5 RESEND 00/17] x86/PMU: Xen PMU PV(H) support Tian, Kevin
2014-04-26 8:55 ` Tian, Kevin
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.